[Jaeth]

Well, it's not uncommon for sites that sell games to estimate a release date - you'll likely see them change it at least a few times before launch.

One thing is for sure, until you see it on Sigil's/Microsoft'sVanguard's official site, there is no official release date.

EDIT: That said, a July 11 release is not impossible - it all depends on the length of the last two beta phases.