Originally Posted by Aubin
In my experience, it seems that once you have 5+ years under your belt, play continuously, stay healthy, and keep it pretty local, anyone who is solidly rated between 940 and 970 could have a super hot day and shoot a pair of 1000 rated rounds and compete for top pro cash. Happens all the time, at least around here.
For players whose ratings have stabilized, they will shoot more than 30 points above their rating 1 in 6 rounds. To do it twice in one day, it drops to 1 in 36 events. With 72 established players in an event, two of them on average will shoot both rounds more than 30 points above their rating. The average PDGA member plays about 6 C-tiers per year. So established players would expect to shoot two rounds more than 30 points above their rating in a tournament once every 6 years or so.
However, there are always newer players on the upswing in their skill set. So you'll see some of those players also shooting well.