User blog comment:Lolzernator/Concerning the earlier release date of DR2 in Europe.../@comment-1973102-20100813133014

I believe the release date remains fixed at August 31st for all regions.

As for the info, it's not just youtube we get it from. Press releases, magazine scans, ect ect. For example, Cora and Trixie-Lynn came to light on the Tape it or Die website, among another things, and Antione Thomas, Bibi Love, Seymour Redding, and Sullivan Sarian have only been seen in japanese magazine scans as well as the official japanese website.