Im have the 2.7 GHZ rMBP.
Talked to apple support today, they said might as well bring it in.
More info, with no displays plugged in, and all programs closed, the machine drops to ~40 C.
Simply plugging the external display temp rises to ~55 C.
As soon as I plug in an external display, im stuck on dedicated graphics.
Do others see the same thing?
The initial 40C seems quite reasonable.