Varies.
most folk are cool with it as long as you ask first, in the interests of getting them moved before dawn..
Some folk are violently opposed to it, and assume you'll then run them all in the shooting turn as well if you are allowed to
Tournaments- ask the
TO. My local is ok with it, but i was told at another that i had to measure every ork's movement individually and exactly, and that i would be dinged for slow-play if it took more than 2 minutes... And then to do the same thing in the shooting phase.
I've also had opponents declare my movement phase over 'because i moved on to shooting phase stuff' , so it does pay to check with your opponent