I've been saying for some time that Notre Dame was quietly working on this one behind the scenes very similar to the way that they worked the Guerby Lambert situation. On the surface that recruitment also started off slowly before picking up quickly and being publicly over. ND has been taking the same tact with Olu. Hopefully it pays off.
For the record, I think he has much higher upside than Von Brandt, Starcevic and Wagner... Like Ronnie Stanley upside. Although he's not as college ready I like him better than Simien as well. He'll just have a longer development track, which is fine at Notre Dame.
And while I'm on record, my take on Nigerians will not change. When in doubt, recruit them to the ends of the Earth and pay whatever it costs to land them. More times than not, it's going to work out for you. Freaky genetics.