I hate the way that message reads. Why not just say, "Decision emails will be sent by ." Any time someone uses "on or around" or other squirrely language like that, I get nervous. And does "after that time" mean "on or around" late Friday, Monday, April, May, June?! I can't tell if the message is the result of deliberate deception or simply poor writing.
OK....that's my rant for the day. I've stepped down from the ledge. I'll be happy to hear from WWS on or around whenever admissions decision notifications are made available and I receive an email after that time.