All I know is this: If you have a 6'6" WR with ANY wheels whatsoever, you are going to have a successful offensive player. The level of success will depend on the level of wheels. Keep in mind that he will be going up against defensive backs that are a half-foot shorter...
EDIT: Also, you've gotta figure that this kid has the hands if he's a hoops player too. Just sayin'...
I think of Dorial Green-Beckham for one (first 6'6" WR that comes to mind) RU had a WR as well. There have been plenty of tall WR's with adequate speed that have been successful. He looks like he has plenty of room to fill out and add muscle. Don't be surprised if he is a pass catching tight end/WR down the road. I mentioned Fuchs in the same post in another thread I believe. A lot of similarities.