If your application is still under review, you should hear back by end of June. We're sorry for the delays and here's more info on what we're doing to get through our current backlog: https://goo.gl/7j1KXt . Thanks for your continued patience!
I believe YouTube is seriously reviewing new channels for approval now. A couple high subscriber channels were finally approved this week. Unfortunately, there’s probably about 200,000 channels that have to be reviewed with more subs than you.