I don't think much will come of Satorri's project, due to participation bias, a small data set of relevant data, and the vast amount of noise that must be filtered.
Edit: And when all is said and done, I think Satorri is right with his/her words on the last page. The thing to do now is to test in-game, and report results. If the disadvantage DW presents truly is a deal-breaker, it will quickly become apparent as we look at data. We're past the point where more napkin math is going to tell us anything new.