I have often had to wait for instructors but I never made anything of it as I was just happy to HAVE an instructor...that said, there have been times where I have missed a good deal of a run (8-9 minutes) of a couple of sessions and its frustrating at times...but they always show up and always are there to teach in the end. Also,I have to applaud Jack for the scheduling at the events and especially WGI this past weekend because it always seems to work out pretty well!
-The Deerhunter