I had smcFanControl installed in 10.7.2/3 beta (before it 'shipped') to make the fans stay running at a higher minimum RPM. I am fairly certain I restored the fan settings to default before upgrading, not a clean install, to DP1 and subsequently DP2. Minimum fan speed seems to be hovering around 2100 RPM at a low temp of ~50 degrees Celsius with minimal CPU activity. However, it seems whether I am running the integrated graphics or the dedicated the temps spike exponentially open running almost anything (CPU intensive or not).
Yes, this is a quad-core processor...but wow does it get loud over hardly anything. It's anti-Jobsian - like the 'new iPad': thicker, heavier, double the battery size for the same life for what? A hi-res display? Jobs would never have done this.