We were there today and loitered around for a good few hours after lunch watching the tracks being checked and what not. They eventually started sending trains around 2ish I think and opened up just before 3 and we were on about the 4th or 5th train maybe - the queue was reasonably long but not horrendous, a couple of hundred max. There was a lot of faff with the preshow (wrong buttons being pressed, doors opening when they shouldn't etc) so it's no surprise the wait was long (not sure of it actually was 2 hours though), better to get it ironed out ahead of Saturday.
The park in general was dead, most things were walk ons or a 5 min wait. We counted less than 10 rows of cars in the main car park and we left half an hour before it shut.
Wicker Man was fab, the theming definitely makes it and there are some really nice touches. The ride itself is good, probably exactly what is expected and a nice addition to AT. I really like GCIs so it's nice to have one on the doorstep, even if it is a tad short.