would be helpful to know if you are talking about BT002R, which is the DOT race tire from pre-2009, or the BT002RS, which is a trackday-oriented tire.
i've used both. the RS got greasy towards the end of the second day at Barber, running 1:40's - low "A" pace. very controlled, but my buddy said i was laying down darkies all the way up thru T4 & out of the museum corner. I could def. feel some squirm.
the BT002R i used for two days at Road ATL in sub-40 degree temps were already shagged, having come off the same guy's race bike, but i got two more cold days out of them with zero sliding around & running good "A" pace all weekend. I think they might've given me some trouble if it had been a warm day.
all in all, the tire didn't really change from the BT002 to the BT003, just the number designation. 'stones are good tires, with good grip even when they are starting to go off.