The problem most people have coming off a clutch on a hill is, they stall because of a lack of RPM's...
A technique I use when driving race cars or very high performance vehicles is the same technique I use on a hill. I BLIP !!!!

If you have ever felt your car "nosedive" when coming off the clutch, it is because you have released the clutch before the engine has spooled enough power to move +3000lbs.
The simple solution, and key to a good launch, is to blip the throttle to 4000rpm. As you are blipping, you can start to release the clutch, smoothly of course. Now if you continue to modulate the gas pedal as you are easing off the gas you will have a very smooth clean launch on a hill or flat slope.

So even though you might think that guy sitting in the car next to you is revving his engine just to sound cool, it's not always the case. An experienced driver will often do that at a stand still to prepare for a smooth launch. And when the light turns green, he will be in a acceleration sweet spot. The RPM and car will not nose dive trying to make power..

So blip away.

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