Bazza, I'd question the first part of that statement, but from that point of view I can understand why you'd claim the second part.
I have always taught a DL start from hips below knees. I've trained extensively with OL'ers who seem to emphasise deep, hips lower than knees, starting position for DL's. Especially a snatch grip allows, or even demands, a deep DL position. I've even known people to stand on blocks so the bar would be a few cm's lower, requiring a deeper DL.