initial connect and and a re-auth appear the same - just that added delay between the server hello and the macbook responding with the encrypted handshake message.
In my 802.1x auth provide I changed the "Interval between Identity Requests" from the default of 5 to 30 seconds.
!
aaa authentication dot1x "<profile-name>"
timer idrequest_period 30
!
If anyone's interested here's what I see capturing eap packets on the macbook itself:
### inline comments highlighted the delay seen
### I start the capture - then on the controller "aaa user delete mac 28:cf:e9:1a:83:09"
1 2013-08-07 10:27:00.887552000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 EAP Request, Identity [RFC3748]
2 2013-08-07 10:27:00.887832000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 EAP Response, Identity [RFC3748]
3 2013-08-07 10:27:00.889222000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 EAP Request, PEAP [Palekar]
4 2013-08-07 10:27:00.890602000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 TLSv1 Client Hello
5 2013-08-07 10:27:00.891929000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Server Hello, Certificate, Certificate Request, Server Hello Done
6 2013-08-07 10:27:00.892440000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 EAP Response, PEAP [Palekar]
7 2013-08-07 10:27:00.893285000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Server Hello, Certificate, Certificate Request, Server Hello Done
8 2013-08-07 10:27:00.893694000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 EAP Response, PEAP [Palekar]
9 2013-08-07 10:27:00.894490000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Server Hello, Certificate, Certificate Request, Server Hello Done
###notice the delay here - particualy bad 20 seconds before macbook responds
10 2013-08-07 10:27:20.913454000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 TLSv1 Certificate, Client Key Exchange, Change Cipher Spec, Encrypted Handshake Message
11 2013-08-07 10:27:20.921292000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Change Cipher Spec, Encrypted Handshake Message
12 2013-08-07 10:27:20.922331000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 EAP Response, PEAP [Palekar]
13 2013-08-07 10:27:20.923792000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Application Data
14 2013-08-07 10:27:20.923967000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 TLSv1 Application Data
15 2013-08-07 10:27:20.925785000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Application Data
16 2013-08-07 10:27:20.925988000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 TLSv1 Application Data
17 2013-08-07 10:27:20.971770000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Application Data
18 2013-08-07 10:27:20.972316000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 TLSv1 Application Data
19 2013-08-07 10:27:20.978457000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Application Data
20 2013-08-07 10:27:20.978710000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 TLSv1 Application Data
21 2013-08-07 10:27:20.980302000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 EAP Success
### so I do get connected.... no I toggle the macbooks wifi off and back on:
22 2013-08-07 10:27:48.763879000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 EAP Request, Identity [RFC3748]
23 2013-08-07 10:27:48.769827000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 EAP Response, Identity [RFC3748]
24 2013-08-07 10:27:48.771249000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 EAP Request, PEAP [Palekar]
25 2013-08-07 10:27:48.772942000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 TLSv1 Client Hello
26 2013-08-07 10:27:48.774251000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Server Hello, Certificate, Certificate Request, Server Hello Done
27 2013-08-07 10:27:48.774718000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 EAP Response, PEAP [Palekar]
28 2013-08-07 10:27:48.775540000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Server Hello, Certificate, Certificate Request, Server Hello Done
29 2013-08-07 10:27:48.775877000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 EAP Response, PEAP [Palekar]
30 2013-08-07 10:27:48.776672000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Server Hello, Certificate, Certificate Request, Server Hello Done
#no delay here! transaction appears the same....
31 2013-08-07 10:27:48.800952000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 TLSv1 Certificate, Client Key Exchange, Change Cipher Spec, Encrypted Handshake Message
32 2013-08-07 10:27:48.807489000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Change Cipher Spec, Encrypted Handshake Message
33 2013-08-07 10:27:48.808353000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 EAP Response, PEAP [Palekar]
34 2013-08-07 10:27:48.809816000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Application Data
35 2013-08-07 10:27:48.809980000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 TLSv1 Application Data
36 2013-08-07 10:27:48.811567000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Application Data
37 2013-08-07 10:27:48.811928000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 TLSv1 Application Data
38 2013-08-07 10:27:48.853859000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Application Data
39 2013-08-07 10:27:48.854216000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 TLSv1 Application Data
40 2013-08-07 10:27:48.856809000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 TLSv1 Application Data
41 2013-08-07 10:27:48.856991000 28:cf:e9:1a:83:09 00:1a:1e:14:a1:f4 TLSv1 Application Data
42 2013-08-07 10:27:48.858440000 00:1a:1e:14:a1:f4 28:cf:e9:1a:83:09 EAP Success