abnormal vertical growth is generally unpredictable, that is why it's important to spot it and address it ASAP
it can happen exclusively to the maxilla (George Clooney guy that I linked, all those Richard Joseph patients, etc.) or to the entire mid-face: vertically long face with low set cheek-bones. the former is an easy fix, the latter? not so much
i'm of course speaking from what I've observed, don't think I have read anything official on all this.