I have huge internet issues for various reasons (some of which I'm sure you can imagine if you consider my location) beyond my control and so I've taken to regularly checking my internet speed. I use www.speedtest.net and for reasons I've never figured, (nor had adequately answered) WGT while not needing very high speeds does need a VERY constant rate. If your speed drops significantly even for less than a second, WGT will hang.
I find this very annoying, I play Secondlife which requires a LOT more of both my PC and my ISP and it handles my connection much better than WGT does, when my connection drops it just pauses (lags) and waits, WGT often bangs out totally. Which btw, is the main reason why I don't play multiplayer games.