If you are playing WGT with your profile/stats pages running in the background, you will undoubtedly be having all sorts of meter jump and stutter issues.
Here's how to solve this...
Go to https://www.wgt.com/members/YOURMEMBERNAME/default.aspx
This will disable the left hand panel and therefore your game play will not be affected.
Also, if you know your member number, the page will load even faster...
https://www.wgt.com/user/Profile.aspx?UserID=MEMBERNUMBER