Balls were close together on real fast cloth, Not a whole lot of juice need to do this. Its true speed can be generated different ways but on this particular shot not a lot was needed. Had those balls been further apart(and/or on old cloth) you would have seen a completely different delivery.
I’ve watched Alex play a lot and his stroke is always short. I don’t have another example handy (searching only found me that one example), but I’m pretty confident Alex’s delivery would not be “completely different” if he’d needed more draw.
Would it have been a bit longer? Probably. But he’s never going to have the long stroke we think of for big draw shots. And it’s likely he can’t get the massive draw that a Shane or Fedor can with their longer strokes.
Again, I’m not saying we should all punch draw and expect to get massive draw. For most of us we can’t achieve that kind of acceleration in a short window, especially while maintaining accuracy.