The 2011 TRS is marketed as having C2BTX, however the 2010 TRS also has C2BTX as confirmed by myself as I ride one. I never thought of looking until someone here mentioned that LibTech has been making C2BTX for a while now.
I suspect (because I don't have a 2011 to compare it with) that the changes may have been where the camber starts under your foot.
hpin, can you prove this with a picture? c2btx may be a late add to TRS in later shipments? i still doubt this but i'm sure you can set us straight with a picture. also, it still may not prove all 2010 TRS has it. i'm pretty sure i have seen at least one 2010 TRS with a pure BTX shape