We were at CSA a couple of weeks ago. On the way to CSA, we had a nice easy-going driver who stopped along the way for a potty break and beer. It took a little over an hour and a half.
On the way back to the airport, we had a speed demon driver who drove like a maniac. My stuff was flying all over the van. The ride took 1 hour and 15 minutes. Believe me, you wouldn't want to go any faster than that. :-)
An hour and 15 sounds about right. The shuttle is a great trip, lots to see and very informative if you get a good driver that likes to talk. It is a great chance to meet the people you will be partying with and to practice your "YAH MONS"