AFAIK, it's not. I remember sitting down one afternoon and ripping quite a few CDs in a row, while watching TV or playing video games, or something. EAC behaves exactly as Brad describes, keeping track of all the ripped but unencoded tracks and sending them out to the encoder in order.

So, like he and I have done, you can sit down and rip several CDs in a row, and then just walk away from the computer without a worry. Yet another awesome ability tacked onto the list that makes EAC the best ripper ever.