any ideas on how people were chosen to be admitted yesterday?

since apparently the defferal message is actually a delay because the aos didn't have time to review all the apps, how did they pick the apps that they admitted yesterday? some people are saying they just reviewed a random batch of people and admitted people out of that, but i feel like that wouldn't make sense because they should have also given rejections or CAP offers based on that. did the few people who got admitted have crazy stats, was it by major?