I am also experiencing issues with my Samsung ATIV 700t with the Intel 6235 adapter. I never really noticed any issues until I began traveling with my 700t. On Southwest Airlines flights, I had issues with the adapter holding a connection with the router. I thought for awhile it might of been Southwest's connection since in-flight wi-fi is not always reliable. However, this kept happening on every flight, so as a test I connected to the onboard wi-fi with my Samsung GS4 mobile phone and the connection was great! No problems with my HP 8460 laptop either.
I disabled the wireless-N setting as suggested on the 6235 and it seems to be able to hold the connection -- pages actually load now using the Southwest in-flight wi-fi! I haven't tested the connection speeds but it does feel a little slow still. The adapter connects fine at home to my ASUS RTN-56U router and AP. This seems like just a workaround.... Really disappointed with Intel....
FYI... I am on the latest drivers 15.8.0.5, Windows 8 64-bit.