I am a Round 1 WL (WL-ed post-interview in Round 1) and I didn't receive any email update but if you go into your portal and check you'll see they reposted the same letter from 12/12/12 (I guess for Round 2 folks it may be the same letter as 3/26 - or whenever that release date was).
For me, during the AM yesterday the letter had gone away, then was reposted at noon (when, presumably, the Round 3 decisions were released). I'd venture to say that if you didn't receive a "release" email yesterday, and if the letter on your login portal is the same as the 3/26 or 12/12/12 one, then you are still on the WL post-cuts.