The meter performance is affected by a multitude of variables and affects every player differently due to their location, internet service provider, computer, what is installed on the computer and the settings on the computer/ browser. We are working on several solutions which will make the meter more consistent or perform smoother in more conditions but we do not have a simple or catchall solution that we can release. We do and will continue to seek solutions.
But to be clear WGT does not have any control to vary the meters performance by time, type of game, round or stroke. We cannot target an individual nor a specific stroke.
If the meter is performing better or worse at a particular moment it is probably due to congestion between the server and your machine or the current CPU and RAM utilization on your computer. We have found that most of the issues have to do with the amount of RAM you have and the CPU performance of your system. Running streaming music/video, itunes, anti virus scans, etc... will noticeably degrade the performance of the meter.
This being said we are actively investigating ways to improve the meter.