This fact might be misleading.
12. Will 802.11ac be backwards compatible?
Yes. 11a/b/g/n devices will be able to connect to 802.11ac radios.
I believe only 11a/n devices will be backwards compatible with 11ac radios.
Most APs will come dual band with an 11n2.4 radio for 11b/g compatibility.
What do ya'll think?