wlc flexconnect wlan local authentication and central web authentication maximum rtt

[y*** D***]

Hi

From the below link below it mentioned that "Round-trip latency must not exceed 300 milliseconds (ms) between the AP and the controller. If the 300 milliseconds round-trip latency cannot be achieved, configure the AP to perform local authentication."

http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Mobility/emob73dg/emob73/ch7_HREA.html#wp1094148.

Is this limitation refer to web authentication also?

Thanks

Anyone???