actually, you are both right AND wrong. Right, regarding that most TBC raid gear, T5 and above, lasted ppl well into WotLK. Especially the hardcore raiders used quite a few pieces from TBC to clear the T7 content the first few times. Vanilla gear on the other hand did NOT last that long into BC, mainly because of the huge STAM changes and true reliance on DEF ratings, and other combat ratings during TBC. Most AQ40 and Naxx40 gear got obsolete quite fast, especially for tanks and
melee. In Cata this is going to once again be the case
, and I for one am all for it. The ICC epics are getting old now, I WANT new loot, regardless of whether its green, blue or even WHITE! :P