I think the one thing that's stopping me from being convinced is that he did it against a team that wasn't game planning for him. As I said on Friday night, Tyrod is built for the preseason. It's easy to beat a fairly vanilla defense that isn't spying him. Not trying to take everything away from him, just applying regular season context to it.
Using another Roman QB, look at how Kaepernick struggled in the pocket once they knew his habits and how to contain him. It's very rare that a mobile and elusive QB can sustain success at this level without a high level of passing talent. Not saying it's impossible but the Tyrod that exists now might not be allowed to exist come Week 1.