Keith, I've been following GW for just about exactly the same period of time, and I don't remember any coaching by Penders beyond trying to replicate Loyola Marymount's style without the personnel, and oh yeah, turning the ball over to Shawnta so we could win 20 games one season. Jarvis wasn't the greatest Xs and Os guy but he adapted his style for different teams. I don't think Bob Tallent was a bad bench coach either. In the time I watched his teams, he didn't have the horses besides Mike Zagardo.
Besides, whatever you think about Penders' bench coaching abilities, the thesis of his book is that he turned around all of those programs. Arguably Jarvis was running out of steam and we might've been headed for a few seasons without an NCAA appearance when Shawnta left, but the fact is that we were in the NCAA or NIT 7 years out of 8 before Penders got here, and the program was wrecked when he left. Even if Penders could somehow argue that someone else caused the damage, the facts don't conveniently line up with the thesis of his book.