I doubt all of them went out yesterday. Based on last year's thread, It looks like a lot went out on day 1 and a decent amount went out over the next few days with a few more spanning the time period between day 1 and decision day. I know it's cliche, but you really can get an interview just a few days before the decisions go out.
Also, for my app, I turned it in a few days before the deadline and live in the Northeast US, so I'm not sure if that adds any value to determining who got invites when.