Not that this horse was right off the track but he did seem to move like many of the ones that have huge trots and everyone gets excited about, except that most of them are very tight in their backs so (it seems to me) they just don’t want to canter. I forgive that in a horse right off the track, but a huge stabby trot from a horse that has been OTT for a while isn’t great.
There is a big difference between a horse with a nice, swingy trot that shows a true push from behind over the back, and one that is tight, dropped in the back, and shows the horse just flinging its legs out. It’s a level trot, not one that goes up and over from behind. I don’t think a lot of people’s eyes are trained to see it, though. Loose backs produce really good trots, and this is one reason why the trot can be improved with training and time. No horse coming off the track can be expected to have a loose back, or even the strength to work over its back in the first place- the way they run gives them the opposite sort of muscle development. So, when there is a tight-backed horse with this huge movement that comes from the legs and not the back, I think people see a fancy shape but not the actual mechanics.