Yep, lots of comparisons to Matisse Thybulle, which I know won't blow a lot of poeple's hair back, but Matisse is a very good player who's talents are being completely wasted in Portland. When he was on the Sixers he was a key cog as their defensive stalwart on the wing.
Dunn I think is a bit bigger, longer, a bit more athletic, while Thybulle is and was a bad shooter coming out of college, Dunn is a bit worse.
Thybulle, Bruce Bowen, Tony Allen... defensive studs who grind and do a lot of the little things. If he can be that, I'd be thrilled.