This is very interesting to me. I think that the release of the arrow can be regarded as instantaneous whether the brace height is short or long. I view the form flaws as being caught in that instant. So for me the time on the string is irrelevant. The length on the string is the issue. So it is an interesting perspective that is being presented here.

So I guess I would say that taking two bows of the same speed the one with the shorter brace height would be more critical.