I have the same issue with the Galaxy Nexus & the Nexus 10 so it is not device specific. I didn't really notice because I had the wifi set to auto. Setting to 5GHz drops the connection. Setting it to 2.4GHz only gives me about 1 bar. Setting it to auto gives me almost all bars. So what does that mean? 5GHz is sorta working but will not work on it's own?