The way that 700c bikes virtually all have 45mm rake forks leads me to believe that there is not a lot of thought going into this. You will occasionally find a 55mm fork on smaller bikes, probably for toe clearance. They are all copying each other. I would guess that is doubly so with the small wheeled bike manufacturers. There are only a couple of innovators, and my guess is that trail isn't on their radar. But I think that people that are used to low trail probably would miss it. I think it makes a bike feel livelier, even though I know it isn't.

I wouldn't discount the importance of feel in this sort of question. If I was really interested in this, I would build a fork and see what it feels like. A friend had a 700c bike with an aftermarket fork that gave the bike high trail. It was scary riding around in a parking lot, I thought I was going to run into things because the steering was so slow.