Normal GA Descent Rate

I fly the Commander in FS2002 and due to ATC I'm usually descending like a Banchee (1200 fpm), trying not to get yelled at.Luckily the Commander is very forgiving as far as super cooling is concerned. I chop the throttle and that thing barely cools down.Anyway, what is a realistic descent rate for a similar aircraft?I was once on a commercial airliner up on the flight deck (international flight years ago when the world was not at risk like it is today) and was told we were dropping at 3000 fpm on our approach.Thanks.