So far i'm guessing everything has gone like this:
Bioware states months in advance that Early Access will be done in waves
Bioware gives a whole extra 2 more days added to Early Access
Most people will get in before or very close to the original Early Access date (which will be seen when that day comes)
Result: Bioware shot themselves in the foot, the world is burning from nuclear holocaust, EA is a bunch of money-grabbing assholes, etc.
As for some of the waves things though, that sucks. Remember too though, that besides the e-mail, even if you didn't get an e-mail, you can try logging in with the client in-case your e-mail hasn't been delivered.