Happens all the time here. But the assertion of A over B is defended as the expression of 'strong opinions'. And 'strong opinions' always trump reason, careful consideration, balance and humility (take a look at the Hersch thread).
Worrying about where A, B or C fit in the hierarchy always seems silly to me, given the variety of contexts listeners come from. But it is ever popular.
Yeah, the "A over B" thing is what got me. If he/she hadn't picked anyone pre-Ornette, I would have just accepted "greatest" as having been drawn from a narrower universe than I inhabit.