I was at Friday's Thackerville show.  He played an hour and fifteen minutes.  But still disappointing.  The music was great, just too short and abrupt ending with no encore.  It was not worth the money we paid to see him.  
UPDATE:  Got an email from the manager at Winstar.  She said John was contracted to play between 75 and 90 minutes and played 82 (I think they are counting walking on and off stage as part of that time personally).  So this may be his standard performance time on this tour.