I don't believe the BrainKing mass of games is reliable. Too many
beginners. If, somehow, you could get the percentages where both players
in a game are among the top ten, you would get a better estimate.
As I said in an earlier thread, I don't believe the first move advantage
is a flaw. I think it is the most natural thing.
Incidentally, the setup I prefer for this variant is : R N B R* B* K N* B
N R