I really don't know what to expect out of a Billy D as a head coach at the professional level. It will be interesting to see. I've always considered Billy to be somewhat overrated at the college level...good recruiter, average in game coach, slightly above average team builder, and good at player development so I'm not sure he's the right guy at this particular time in OKC.
I actually think Billy would be better for a younger team where he could command more respect and work at building individual skills and build something, I just don't think he's a guy that is one if those to put you over the top.
As a pistons fan I always liked Gentry. During this tenure here I thought he did a good job considering the circumstances (the roster he had to work with was Hill, Stack, a bunch of trash, and an aged Dumars) and I believe he's improved significantly since then especially as an offensive mind.