Doug, mine got the tires switched out AT the LBS when I bought it, so other than the test ride I did on it with the stock 32s I guess, its always had 28s. I really like them for on road stuff, and just have never gone anywhere with enough dirt riding to warrant getting a pair of wider tires.
I always say thats one of the advantages of a cross bike, to be able to put wider stuff on, but my riding just doesnt include enough of it to be worth it to buy a pair. Im comfortable on 28s on dirt roads that we see around here, ie not lots of loose stuff, so its not an issue.

Brad, to be completely honest, Im too lazy to do that. What I do take out of this discussion of bb height (or drop that you refer to) is that for me it doesnt really change the feel of riding, other than going up over curbs and such, which I do find handy on the mtn bike if I go over really high ones as one runs into once in a while in a city.

cheers

ps, Bek , it would appear then that both my Tricross and Dougs Volpe dont really have high bb, as they are pretty much the same as a LHT or a Cannondale Twhatever.
I have to say the diff between my two bikes, despite 15mm of bb height diff, really isnt that diff. I figure its hard to compare when I take the same corners fast with both, simply because of the diff bars, so my weight distribution is different. They certainly feel diff but I cant say that one really thhhat different. In slower turns, 20, 30, 40k the mtn bike is nice and nimble, quick steering and really transitions nice and fast from side to side.
So for me, its certainly not like I feel one is diff, especially with the bar differences and my body stance difference coming into play.