What I am about to say may be nothing, but, many verbal contracts are binding. If Tech took action based on an agreement and offered consideration in return for the agreement, then Drew's verbal acceptance might constitute a binding contract. I am not sure Tech would want to hold him to it at this point, so it might be a moot point. But, I am curious as to why neither Vandy nor Drew nor any other media source as said outright, "the deal is done." It is always, "it was reported by a source."
This all may change today, but I wonder if MBob is going back through the negotiations with Drew and asking some pointed questions. Also, perhaps, with Vanderbilt, related to monetary damages. Vandy and Drew still have room to say they never had a deal since Drew was bound contractually to Ga Tech. Tech has suffered considerable damages here and if Drew had agreed to a deal, there are potential consequences to backing out.