I watched some assistant coaches yank him off the field by his jersey collar while he continually missed blocks from the A Back position, then I heard PJ griping about how players aren't working hard in practice because they think they don't have to worry about losing their starting jobs, then I saw Marcus Wright's redshirt get burned, then I didn't see Greg Smith on the field again.
That's what I've seen. I have no inside knowledge, but I can put two and two together. I'd honestly be surprised if Smith stays with the program through spring drills.