Since I got a pretty powerful Puter, I've stopped clearing my Puter cache. I do delte my Flash Cache except for the Wgt file.
I'm just saying this is because the game uses files stored on your puter from past games/courses that helps to make a faster load for each shot. If you delete those files, then your puter will be loading in info from the Wgt Servors.
My Theory is when you are getting meter spikes,,, your puter is loading in info for that hole still, when you are taking a shot. Your screen will still look the same, but it might be loading in some more trees causing a meter spike.
-Roger