I have only witnessed one gig nearly at the very start of the corresponding tour (2nd gig on the GMETID tour) and the band were really rusty. A month and a half later they were superb, but I could not help but think that the people who attended the first few gigs were somewhat being shortchanged by the lack of (enough) rehearsals prior to the start of the tour.
On the other hand, these mistakes are what make them human and show that they are not playing over prerecorded tracks like some of their contemporaries.