Whether this was a driver error, mechanical problem, or some combination of the two; Nissan should be taking notes.
When the new M3 was released for "magazine/press testing" the E92 M3 was pre-fitted with "track pads," specifically because BMW already knew the car would be driven hard around a track, consistently. Watch the Top Gear video, they note this specifically. Logically, it'd seem like common sense to equip a magazine test car with better pads; especially if you already know the car will be tested repeatidly on the track, not the street.
I'm curious to know why the Nismo doesn't have brakes unique to the Nismo. That aside, if the brakes aren't really adequate for track use, fine, but why make the Nismo out to be born from racing heritage and knowledge... only to give it a "Brembo-like" braking, but not really?
The Oil Temp debate is sad: spend $40k on a 370z then go home and spend $800 more for an oil cooler....cool story-