Hi -
I'm an instructor with the VMware education group. I teach the Fast Track course on a regular basis (and talk with the other instructors who also teach it) and my experience has been that the class does indeed run most of the 10 hours allotted each day - at most you might get out 15 minutes early on a day or two (which is usually offset by staying a little longer on some other day.)
Bottom line - count on 8am-6pm as an accurate estimate of classroom time.
Hope this helps,
Bob