I got a chance to do a couple of laps on a TZ750, and it was pretty cool! It was definitely light in the front not matter what you did and no matter what gear you were in.
In all reality though, they were never all that powerful, being old school two-strokes. You could maybe get 120hp out of one before the cranks would start to fail. Most of today's diesel 600s make that much power, and they're a lot easier to ride!