When a pitcher's stuff is that good and then has a start like this, it's really tempting to think something has finally clicked.
In terms of (perhaps meaningless) intangibles, early in the game, he got a big strikeout and was, understandably, very hyped up. I loved the energy, and commented as much, but it also struck me as someone who was surprised they were doing as well as they were. After that, though, he turned into a pure ice man. And no melodramatics in the dugout when things got hairy in the 9th.
That's all to say, I like his stuff, and I like his composure. Seems like he could be a cult-favorite Bird.