Reading some articles today, it seemed like Tannehill got an early leg up on his competiton at QB. I think it was Philbin who said that RT learned the playbook in about 3 hours. Im sure that's a stretch, but the offense Sherman runs is supposedly very similar, if not the same one, he ran at TA&M.
If RT knows the reads, routes, and throws needed it has to work into his favor. Im thinkin Ross did want this guy bad and now Im thinkin Ross wants him starting.
We shall see I guess.