I have no inside info as to how he's looked in practice, but from Bohl interviews...while he hasn't named a starter, he's also been consistent in refusing to say TVW and Smith are on even terms. They're not, TVW is clearly ahead. I think Bohl just doesn't want Tyler to become complacent.
TVW is quite the mystery, though. Even if details of his practice standing leak, we're not really going to know how good TVW is until the NMSU game and beyond. I'm not sure what to expect other than having the lens of knowing he hasn't played college football yet, so some level of patience might be required.
Or maybe he'll be amazing from the start. I don't know, the dude really is a wildcard.