Browser version is almost unplayable for me few past weeks. It have some tiny moments when I can catch the meter, but it's VERY unstable and unexpected.
On Android device it was good all that time. But few last days notice some jerking there too.
Don't have a big knowledge in programming, plugings and other such things, can only say my own opinion from previous "periods of jerking" (not SO huge and terrible).
Saw a similar thing sometimes when game's servers was pretty busy (fridays nights for example). And if many different guys with different computers says about this problem, case is not on thier ends. Lags began after US Open including to game (as I can notice). Small at first, but bigger and bigger with time.
So, from my point of view, not only our cache needs to reguilar clearing (I do it every time before logging in WGT btw), but game servers too. Or even some upgrating for so huge event with many thousands players like USO Qualifing.
This game became my favorite in whole internet (which another sport game may be played on gagets the same as on PCs?), and I really don't want to lose it due to "meter jerking"...(((