dwshimoda,
Sounds like the same school from where I train, but they only do PPL here. Nothing to do with ATPLs, what I think it is, is the predominance of AA5s they use. Probably the most appealing four seat tourer I've flown, but seemingly totally useless as trainers judging from the number of PIOs, grounded props and a/c retrieved from the trees at the far side of the runway compared to the other school based there who use a mixture of PA28s, PA38s and 152s.