It's actually quite a bit more than that, but it adds to the over the top effect of the movie, etc. You can read up on the alterations at wikipedia.
To appease the requirements of the ratings board, Verhoeven strove to reduce blood and gore in the most violent scenes in the movie, including the malfunctioning of ED-209, Murphy's execution (where his entire right arm is severed by a shotgun blast and a final overhead shot of Lewis sobbing over Murphy on the blood-soaked floor), and the final battle with Clarence Boddicker (in which RoboCop stabs Boddicker in the neck with his neural spike and Boddicker's blood splatters onto RoboCop's chest).
So it's a minute of extra gore. I forgot about the OCP office guy getting shot up by ED209, that's about 45 seconds right there. Not huge, but I'd rather have it in than out.