I can understand the frustration. I am having this same problem on my new 770 with the latest firmware. I searched all over and can't find the solution.

I can connect at some public hotspots and surf ok. At home, forget it. Sometimes I can get Google but rarely the nytimes with images, normally just text. Can't get the Accuweather site, can't get Tableteer.

IP addresses are in order (checked my laptop), so that's not the issue.

I have a feeling some routers don't handle the 770 very well - but the exact reason I can't tell you. I'm not an expert at network analyzing.