I think we are in somewhat unchartered waters here. Once we have a few more data points, maybe we will have a better idea of whether this is a good idea or not. Ziggy and Lasike were succesfully converted athletes and I can't think of a whole lot of flops.
I see what you guys are saying about these guys having lower floors and higher ceilings, but the lower floor is not super important in my eyes. There are several guys in each recruiting class that never contribute for one reason or another. Only risk you really have is a little less depth.