Depends on what the need is. Someone I know got the call after only a couple of weeks, but he was in the same batch as some other guys who'd been waiting for a couple of months already.
There was a time when they didn't require a sim evaluation, but that's now changed. The latest batch of A320 applicants will now need to show what they can do in the sim.
The evaluation ride will be in the A320 sim over at Clark, which is always breaking down. Not sure what the syllabus is, but I hear it won't be anything as exotic as, say, an engine out drill. After all, they don't expect the applicants to know how to fly the Bus yet.
Can't say if they also require this for the ATR applicants.
If you have 3,000 hours TT, an ATPL, a Philippine passport and a good attitude, 5J will even show you the left seat of an ATR. They really need them captains.