I know I have been critical of Dallas and I'm still not sold on his early success, but maybe he has figured out how to pitch better with less velocity.
Brooks Baseball is a pretty sweet website that shows lot's of cool data. I'm going to attempt to add a link to that shows Keuchel's max velocities each season throughout his career. You can actually change it to view by month as well.
If anyone is in denial, there is your evidence.