Ask HN: Average time to receive a reply to a Y Combinator application?

I was just wondering how long does it take for Y Combinator to review applications.

I am sure they are very busy and it is not easy to choose which startup you want to accept. I just wanted to know how long does it take to receive a reply or a question in your account?

Are rejection letters given right after they review your application or after they are done the application deadline?

Gracias