coolraz

How much brake fade is normal on a G37x coupe?

I havent' experienced it until just recently (only had it since october so mostly have driven it in pretty cold conditions anyway). But last Friday I was driving from work and after a few hard braking into corners (not slamming on brakes, but definetely more agressive than normal), I could definetely feel some vibration. After I kept driving normally, it went away.

So first of, is this pretty normal brake fade right? But I was surprised it didnt' take much for it to start....I would hate to see what would happen if I took it to the track....
So.....should I be concerned?? Or does everyone experience this? Thanks for any advice!