I've had a lot more time with this game (nearly 40 hours and 100 rounds in), and I'm still absolutely positive that it's broken for mouse - particularly on Masters swing difficulty.
100 swings on the range (with calibration) resulted in ONE perfect tempo. I've played a dozen rounds on the same difficulty and could count the perfects on one hand. I'm also watching the results of controller users, and they are not having nearly as hard of a time. I just want the devs to look at that imbalance.
In comparison, on Pro-Am difficulty, I can hit perfect nearly every swing. On Pro difficulty, I get maybe 40-50% perfects. The big difference is that fast/slow on Pro aren't nearly as punishing. Dropping down to 1% on Masters is ridiculous.
For the record, not getting "perfect" isn't the real problem ... it's the amount of variance in the fast/slows. One shot will be fast and veer off course maybe 10 yards. The next will be a super slow that slices 90 degrees (seemingly always when there's water on that side). There is NO consistency.
Flyinjoe ... in my opinion, I'm not sure why someone that sucks at real life golf would ever want to suck in a video game as well. That makes no sense to me.
Tiger Woods in his prime shot absurd scores ... why? He was super consistent with his swing. Any golfer that has ever been top ranked, got there through consistency. It's the defining skill of the game - period.
I love video game golf, because I'm super consistent with fine muscle movements in my hand/wrists. If I wasn't consistent, then it would certainly be more like real golf - and what would be the fun in that? I play video game golf so that I can shoot like Tiger/Rory/AnyTopGolfer.
Regardless, I should be able to accidentally hit more than 1% on Masters ... so, again, please, I ask that the developers take another look at whatever calculations are being used for mouse input.