I just put my pledge in today and can’t wait for this. It will be the only way for me to have a TZ in my home...
The lag is pretty bad on the PS3 but I and others have had luck with quitting the game completely and then restarting the game. After that it has about a 50/50 lag free success rate. That to me sounds like an issue with coding.
Another thing is that I've never had a lag issue with my Zen pinball games. Maybe Farsight will release a patch with the next set of tables.