Yes and No.
It is true that in most cases any meter problems are related to the player's computer. The original poster is right as well, however, that the meter issue has rather worsened than improved. This is my personal observation and the observation of many other players - a glance at the forums and thread titles will quickly reveal this.
It feels hard to believe that this is solely the result of deteriorating players' computer performance, and that people ignore computer settings and suggestions like yours to continue pouring money down the drain. More likely this is primarily the result of the various flash animations that have been added to the game browser window (friends logging on and
off, club names and logos, etc).
The problem lies in words like "most," "primarily," etc. Since the meter issue CAN be related to the player's computer, and since WGT explicitly states in its Terms & Conditions that it does not warrant the accuracy of the Materials and is not liable for any errors, WGT CAN decide not to do anything about it.
For the sake of customer satisfaction, however, WGT may want to consider incorporating some changes suggested by fellow players, such as decreasing the number of flash animations in the game browser window. Most of these are not essential for game play and should be easy to remove. No matter how significant the impact would ultimately be in terms of meter smoothness, it would at least underscore WGT's interest in customer satisfaction.