I learned to drive in a manual transmission car and have been driving them for years; while my clutch control is not perfect, I'm generally very good with it, except in my 1985 Supra. Often when pulling away with 1,200-1,500RPM of power, the whole drivetrain shudders as if the clutch is missing half its friction material. It lasts until the engine and transmission are up to the same speed. The shudder is most pronounced when the engine and transmission are cold.
I've experimented with many different throttle settings and release rates for the clutch and nothing reliably reduces the shudder. It only happens in first gear, and only until the clutch is fully engaged - after that, first gear is as smooth as the others. Once the car is moving, I have no trouble changing to any other gear. There is, however, noticeable resistance shifting into first from either neutral (standstill) or second (decelerating), which I have been told is just a worn synchro.
The clutch was replaced at around 99,000 miles and the car currently has 117,000 on the clock. The clutch is still under warranty (miles, anyway) and when checked at the recommended intervals, the fitters have said there is no problem with it. The transmission is original. The previous clutch had completely worn out and the flywheel had to be reground to accept the replacement. The clutch is a standard (non-racing) and is hydraulically operated.
Since this only happens at pullaway in first gear, I'm unsure what the cause is. Although it generally lessens as the engine and transmission warm up, it's very uncommon it's completely eliminated, and I can get it after a reasonably long drive. I accept it could be poor clutch control, but I am able to drive other manuals without this sort of pullaway (with smaller engines, granted), so I am just curious what the cause could be.