Mine (and the general impression at the Lenox Square Atl Apple Store) was one of awe. Panther looks amazing. Apple is really listening to the user feedback. Just about every gripe with Jaguar is addressed. Fast user switching, Font Book, Expose (great feature), etc., all look amazing.
The specs on the G5 look amazing as well. The promise that in 12 months the G5 would be at 3ghz was reassuring too.
The only disappointments? There weren't any G5s at the store ready to be sold, and there was no date for Panther except "later this year", which probably means Dec. 31st in Steve speak...