To be honest I've never really checked the temps before.
I own this laptop since October 2012 but I've started worrying only recently because summer just started to kick in (I live in France).
I managed to get a read on GPU fan rpm too (for some reason the monitoring of fan speed was disabled in WHiNFO)
The result for the GPU fan is 2000-2200 rpm on idle and around 3600-3800 rpm on full load which appear to be perfectly fine.
The reason why i'm worried is because on almost every forum i looked, the GPU temp announced on full load was 80°C while mine sometime goes above 90°C