It does seem like this may be the RTM build, although the timing is a little early yet.
My first reaction was the build number 7600 is very similar to the XP build of 2600 (yeah, I'm grasping at straws here.) It would be in MS favor to strongly relate this to XP and try to distance themselves from refencing Vista, which the correlation I just noted might help backup in people's minds.
However, the timing is just a little too early. The stated general retail release date from June's Computex is October 22. Historically, a MS OS RTM is released 30-45 days prior to the general retail date. That would place the RTM as beginning of September at earliest. Even a generous 60 day RTM date would place the date in mid-August, a month from now. Pressing and stamping aside (and what's to say a RTM DVD can't be downloaded over the net from a registration server similar to how volume and open license customers can already do), that's a little early yet.
And can anyone draw any significance from 16384 being 2^14? Or would that just indicate something like the 14th build of the master OS?