No clue. Your guess is as good as mine at this point. What we need is a benchmark.
Edit: I see you're way ahead of me on this.
It seems we've come as far as mere discussion can take us. I saw your benchmark post, so anything else related to this topic should probably take place there. Looking forward to the results, and I encourage members to participate. I mean, we're going to learn new things while playing games. You can't ask for much more (well you can, but that's greedy).