I think it's irrelevant. If you browse back through the stats, you'll find the coach profiles are working quite well, that the sliders are causing the stats to pretty much exactly match NBA AVG's (except where they are not meant to-- steals, for instance). The project never excluded a single stat post unless it didn't use the sliders as posted-- it included all rosters, teams, skill levels, etc. Therefore, I think we can safely say, it doesn't matter.
As far as rosters making players perform like their real-life counterparts, I'll leave that up to the people who use the rosters to debate.