I waited 15 mins on a slow'ish day in October 2011. California Screamin' was closed, so the guests were distributed to other areas even, normally making lines longer. On a slow day at Hollywood Studios, that darn line is still like 60-90 mins! On that same day we also walked onto Soarin', definitely beating the usual 30-45 mins at Epcot. It is weird how the same ride has different popularity at different parks.