I rode it this past Saturday, there were at least two trains per track... I don't think capacity will be a problem, seeing as how the ride is under 4 mins long, if it stops a lot...
I don't know if the stops are programmed or just because of trains backing up, but we spent just as much time stopped and waiting as we did moving...
The ride is alright, kinda like the other rides in Suess Land... not long enough and too much standing still...
Oh and the que line... just like other ques at Universal, really, really long and winding... reminded me or Popeye's que (you know, the que that never ends)...