Jonathan.Link:
I believe the Rego Corpus "move quickly" guideline has had a semi-official pronouncement from the 5th edition line editor that the Rego Corpus guideline for moving quickly is 40 mph, the same as the Creo Auram guideline for flying. I have something of a philosophical problem with this, having played both auram and corpus specialists. I really dislike the idea that "quickly" within the Ars/mythic Europe paradigm is 40 mph and Corpus (lower guideline) and Auram (higher guideline, and requires finesse for fine control, which Rego Corpus doesn't) are functionally equal.
IMO, Rego Corpus move quickly should probably be about 15 mph. It's still really quick and they can cover a large amount of ground, just not as fast as someone with auram magics...
I'm unfamiliar with the Rego Corpus guideline for fast movement, but I should think that for travel and combat purposes, flight is an immense advantage that shouldn't be entirely discounted.