Ditto the hot mud...
John in New Mexico
>I'd go so far as to suggest dumping a contractor who's using premix wet mud on anything but minor touch up or at most repairing a few seams. Hot mud is so much easier to use, doesn't shrink much, and speeds up the job considerably by not need hours to dry before re-coating. This is why I'm skeptical of pros using wet mud- who pays for that time? Even if they are juggling two or three jobs in the area, its pretty inefficient, and even if they don't literally bill you for waiting for the stuff to dry, the customer still tends to pay for a contractor's inefficiency.
Just my rather skewed .02, since you asked.
Heat is also helpful, even with hot mud.
John