I keep hearing we are trying to reduce taxi times, well sorry, it ain't happening. Years ago programming was done at the gate so you were ready to go when the tug was clear. Now we are told one engine and be ready to move the aircraft at disconnect to lower ramp congestion. Technique, I don't tune up tower until I'm ready. If the CA does then we usually do a 180 on to the parallel taxiway or cross the runway to finish.