I replaced the thermal grease with AS5 and the CPU temperature decreased about 7C from about 61C (9600M) or about 52 (9400M).
The chassis is apparently much cooler. Running CPU/GPU intensive applications for minutes, the fans doesn't even beef up from 2000rpm.
I have not gone through the 200 hour break-in process.
And I'll open up again later to see if I applied too much AS5 and re-apply it again.
You might want to try replacing the grease. When I first saw the factory applied grease, it is pretty similar to the photos on iFixit.com . It doesn't seem to be too much but after replacing with AS5, it is still too much.