Yikes, sorry I haven't posted in a while despite this thread being dug up for me... Insane schedule I tell ya.
Anyway, I don't really put that much faith into Jack Horner's theories. Also, he was one of the most adamant that T. rex was a scavenger, wasn't he? I find it much more plausible that T. rex was like a lion, a hunter that simply scavenged when the opportunity presented itself. And yeah, I'm not so sure about the Torosaurus/Triceratops theory either...