Recently I've came across Monero proposal (btw. I haven't heard about it at all until now) and it's already in 19% of Commitment phase with 70 people already committed (as at time of writing) and it was proposed only 11 days ago. I may only assume it was advertised. So this looks like new sites can go from scratch into private beta just as quick as within 2 weeks.
Ignoring some sites which skipped Definition and Commitment, are there any statistics available which show the top quickest proposal which went into private beta (matching the whole criteria for previous phases)?