Off track but I in relation to the Toyota comment... I previously owned an 88 Celica, custom extractors, full exhaust, POD, CAI blah blah and it got hammered for every single one of its 65,000K's i did in it while I owned it (bought it at 120,000). Only ever replaced the CV joints as part of the scheduled maintenance, other than that... faultless =D
Remember though that hammering is all a matter of perspective... as is the case with GTR's. For me, hammering the sillycar was WOT to around 5200RPM (went red at 6) you could feel the engine begin to strain excessively and was not making anymore power by that stage so there was no point revving it harder. I imagine GTR's are much the same, just because they have a stated redline of (umm crap what is it? like 8K or there abouts?) Doesn't mean you can do that all day every day. I've currently got a SII 33 (looking for a GTR perhaps... anyone selling!)and thought it goes red at 7, I never go harder than around 6200 as it seems to fall of the torque curve there (stock car aside from POD and CAI)
I think sometimes driver feel for the engine capability is an important aspect of owning a performance car. Sometimes I wonder if the younger GTR owners out there lack this feel (ok ok so I'm only 23). They seem to basically just look at the guage or, even worse, only react when some monstrous shift light tells them the engine is screaming. No offense to younger drivers at all, this is only my opinion based on what I've seen of my younger brothers mates.
Let's not forget... they're quite old now and generate a lot of heat in that engine bay.. Age, K's, Heat are all going to take their toll on the car. Yes they are a wonderful car (I want a 32!) But I think we do have to accept that as with any model of car, there will be good and bad ones and that even the good ones are still OLD.
Just my 2 cents ^_^