It's weird that the color for the winner is red and looser green. It's kinda counter intuitive from what we are used to (ex: traffic lights).
It just happened to be that the page on the left would always be green, the page on the right would always be red... It doesn't look dependent on winner or loser.
Oh, I guess I was unlucky... Still an odd behavior.
Is the submitter the author, or do they post here?
I'm the author. I just found out about ycombinator by finding my site on it. So I didn't submit it.
Glad to see it got so much interest. There were literally tens of thousands of people trying it out just a few hours ago.
I'm writing a hosted load testing solution at http://testomatix.com. It might be nice to cross promote at some point. Maybe something like I recommend your site to see how you stack up to competitors, and you suggest mine for load testing. Drop me a line with your email if you're interested. I'm ebeland on gmail.