I am one of the fortunate one's not to suffer from meter problems or from loading/disconnect issues.
I regularly clear all my caches, and clear the supercookies. I find rebooting the browser every couple of games helps too, with Maxthon that is a quick process. As Apex says there is a good post on optimising your computer.
I am still running on Windows 7 64 bit and have a fairly new computer, but not a fancy high powered machine. I also have superfast broadband and the latest router to go with it. I have no idea whether this all makes a huge difference, but as I said above I have few issues to complain about.
If I hit a bad shot it's my fault, not the computers or WGT, which if we were all honest, is the case for most of us. Easy to blame WGT or servers or anything else, but the one trying to hit the ding for the perfect shot.