I'm trying to set up my fancy new wifi and having problems getting on of the WLANS to get anything more than 54Mb/s.
It's configured;
WPA v.2 auto encryption
All radios enabled (a/n/ac, g/n)
No CoS
802.1X authentication back to the NAC.
Any ideas? What am I missing here 
If I create another WLAN with the following I get full speed.
WPA v.2 PSK
All radios enabled (a/n/ac, g/n)
No CoS
Auth disabled
-TT