I would think the real reason he is waiting to announce anything is he will not make a decision until he knows Tiny has confirmed he is headed to the NFL.
Has there been any indication that Blair will only play LT? I would think the possibility of bookending the line with Tiny would be an enticing prospect for him. Takes pressure off of him to be "the man" and gives him the opportunity to shine at the same time.
If I'm a top Juco OT prospect, I would be looking to play LT in college as that is where the money is in the NFL. He could very well be open to either side. I'm just guessing he would prefer to play on the left.