I never understood why people get upset when one of their players isn't thought to be NBA quality. I mean some of the all time great college players never did squat in the NBA. Totally different game.
That said, I don't think EITHER Iowa or Iowa St. has an NBA player on Scholarship right now. Niang, Ejim, White and Basabe just aren't big enough to play the 4 and are not quick enough for the 3. Kane and Marble don't have the handle for the PG position in the NBA, and aren't good enough shooters to play SG. Even Woodbury at 7'1 doesn't look like an NBA player. He does have time to develop and he is 7'1, so I wouldn't totally write him off. All it takes for a 7'1 guy is a good SR year, and he could be drafted.
You watch a lot of Marshall games? I don't know enough about his game to say he will or won't make the league but everything I've heard about him is how versatile he is and that isn't something GM's hate.