Yep, it's the same: volume down + power for around 10 seconds or so. If you start holding the volume down button first, you'll also avoid taking a screen shot while trying to do it.
Removing the back of your phone and pulling out the battery.
Since the battery in the RAZR/MAXX is non-removable, you have to do a simulated battery pull if you're in a situation where you need to completely turn off the device and it won't power down via normal means.
Also, to prevent from getting a screen shot taken when you do the simulated battery pull, press the volume down key, then press the volume key and hold them both down... it works on mine
DROID RAZR MAXXIMIZED!!!! PREPARE TO BE VANQUISHED!!!
I went to the Motorola tutorials on ICS because I too was curious and it said nothing. You would think they would mention it. You know just in case type stuff, thanks forums.