I know of an r31 in japan that can cut an 11
and yes 12's are very doable in an r32 rb 20.
ben gtr came pretty close with his gts4.
there is an r32 gtst with an rb26 i qld that runs a low 11's
the bigest thing holding people with rb/20's back is you need to take the big step to run 12's injecotrs big turbo and metal head gasket. the are some strong rb20's around jsut because you dont hear of them doesn't mean they dont exist.
btw there was another from pet in melb that ran a 12.9 or so with a top speed of 120 or so
I expect dr drift here to come close to a 12 if he continues his development program on his car.
meggala
as for me I'm happy with a mid 13 unless someone wants to pay me to run faster