I get similar issues (long page loads, extremely large lag in chat and questions), while via 3G in Poland. It's not solely 3G's fault, because many other sites (including FB chat) work ok, but it's clearly triggered by a specific environment.

With landline connections OKC works very well :-)

Once in a while I find Chromes rendering engine slow down trying to render multiple OKC pages at once. Similar to trying to view TechCrunch only not nearly as bad.

How?