early action notifications

My child applied early action to a number of colleges and has already received responses from several schools. Is it typical for colleges to send decisions well before their published announce by date of mid-December?

My son applied to a good number of schools also. As of 11/18, he has already been accepted at 4.

My son applied to 5 colleges EA and hasn’t heard from any of them yet.

My S applied to 5 EA and 4 rolling and hasn’t heard anything yet. He went on to check yesterday and realized several don’t have his ACT score, though they were all ordered the same day. We opened up a case file to see what’s going on but so far no word.

My son applied to 3 EA and received acceptance at one and have not heard about the other 2.