Wow! Best laugh I've had in a long time!
I've been dealing with everything alleged in this thread for 3 or 4 YEARS now!
Excepting the meter and green grids, which are smooth at least 90% of the time, the presentation on my pc has been varying grades of choppy since the 'red screen' period several years ago. I always attributed it to either laziness or incompetence on WGT's part. Changing browsers never affected anything; cache clears helped somewhat but never to the point where anyone would use the term 'smooth' to describe the presentation. I haven't needed to play the game on any other pc recently so I had no idea I was apparently in rare regard here.
For what its worth, the presentation's actually a bit less choppy than normal here at the moment. Go figure.
Ah well, welcome to my world everyone. Enjoy!