I think I agree with everyone on the list except for Romo. Ponder looks like he is developing, too.
What really impresses me about Tannehill is the very evident improvement he makes from week to week. We are not seeing batted passes after game one. We are seeing fewer poor decisions with where to go with the ball. We are seeing him take better care of the ball when the pass rush gets to him. The numbers aren't gaudy, but look at what is surrounding him. Every week we have 2-3 plays where his weapons just flat out kill drives where Tannehill is moving the team downfield. This week we had Charles Clay dropping the ball and Daniel Thomas embarrassingly get run down from behind on that nice third down screen pass.
The single most disastrous thing that could have happened to the Miami Dolphins in 2012 would have been David Garrard starting week one at Houston.