I wouldn't doubt it. But they also don't publish any figures so its difficult to confirm. I work for one of their competitors and we most likely have the same availability requirements... anyways, just curious. Here's where we're at, as a comparison http://bit.ly/qLrKOt

edit: looks like they did publish some figures :) http://techcrunch.com/2010/07/01/mixpanel-billion-datapoints...