Mine's 1800+ is also much cooler.
It reached 58-60°C only last summer, with 35°C in the room and full coding process.
As for now, it starts under 40°C and stays under 50°C at full charge (>99% CPU for hours) with room at 16-18°C.
Do not know if it's a Thoroughbred or Palomino though.
Fréquence's: 1527 MHz, L2: 256 KB and it shows 3039 Bogomips
Internet <=> Share all we can.