Do you think think that your user base is a little more health aware than the average population? I would expect that someone using your site is going to be more self aware, affluent and health conscious than the average that the CDC is polling. For example, how many single hispanic mothers or black senior citizens use exist.io?

Though I can't back it up with data, I'm sure you're correct! Plus I suspect most of our small user base is early adopters who of course tend to be younger, affluent, etc.

Sleep Cycle also report 6:50-7:15 hours sleep on average http://www.sleepcycle.com/sleep-cycle-6-month-us-sleep-repor..., though technically that is time in bed, not necessarily actually asleep.