Around here this doesn't happen too often above the B class competition. That said, If that data seems useful for you, that's fine.
Here is my data, my division M class results from the Nationals. I picked that class out because two dudes from the top 10 and four from the bottom 10 are people I routinely compete against. Brett and Marcus usually beat my ass by about 20% but I have had moments of doing OK against the bottom 10 group contingent.
Top 10 averaged about 30 alphas more than the bottom 10, and at the faster time. That doesn't happen with looser accuracy standards.
Name % Pts Time % psbl Div Class Cats PF Mem # A B C D M NPM NS Proc Apen