After reading Paw Paw's post, it occurred to me that I did not take into account my frame of reference. For my purposes (my frame of reference), I was thinking in terms of my preferred position for fast draw, 3:00 or slightly forward. In that position a forward cant requires me to "break" my wrist, so I prefer a vertical orientation. But, for concealment purposes, people may position their holsters to the rear of the 3:00 position, and doing so, I can see where having a forward cant (instead of my preferred vertical), would be a more natural position.
This is my experience, too. If the gun is worn directly at the side, I prefer a straight-drop holster, but the further to the rear the holster is worn, the more cant I want, both for additional concealment, and for a smooth draw (my wrist remains straight if the holster has the appropriate degree of angle).