Right on. My wife and I spent a week strafing the Colorado front range twisties. Riding hard 2-up can be quite fun. Its also highly entertaining when you go around a purebread sport bike on the outside while 2-up on a Bandit with a week's worth of gear and sparks flying from the peg feelers
I find that adding rear preload is generally pretty critical if your pillion is significantly over 100lbs. Around 100lbs more preload certainly still helps, but seems less necessary on most machines.