Ask HN: Anyone have pre-launch (i.e., LaunchRock) metrics to share?

I just put up a pre-launch page using LaunchRock and am looking for numbers to benchmark against. Has anyone run ads and tested conversions on a LaunchRock or custom pre-launch page? What kind of virility are people seeing? I'm already testing different pics and content and offering incentives, but any other tips to maximize invite requests (and especially to promote virility) would be greatly appreciated. If it helps anyone, I'm seeing about 55% conversions from ads to invite requests but very little virility. I don't want to share the page yet because I don't want to distort my tests but I will publish it in a day or two when my current test is up if anyone is interested.