I know a QAC A320 course earlier in the year had 30 people on it. Definitely a flood of A320 guys.
I had a mate do an ATR course with QAC and there was only a handful of people who where already employed by companies performing maintenance on ATR-72 or 42s. Definitely not hundreds there as far as I am aware. And also QAC are currently unable to run a Practical course, so guys doing his ATR course certainly ain't walking off all licences up.
In Europe its much the same. Pay money and and pick up a rating just like here. Its a follow on of the EASA and Part 66 system we now use. Have a chat to Harry McDougall. He's teaching all his courses as per what CASA have dictated.