A lot of Fangraphs guys have been down on JT, predicting regression based on his lower K rate, strand rate, etc. He's not going to keep up his current pace, but having watched most of his starts this year, I think that the lower K rate is a by-product of his dialing the velo on his 4-seamer back a little bit and controlling it better. He's been effective at inducing poor contact. Having eyeballed him as much as I have, it's hard to believe he isn't for real.
The thing that has improved is his two-seamer. The slider is a good pitch for him.