Correct - the second of the three big batch acceptances will be sent out at the end of this month, effectively filling 2/3 of 2016's entering class. Keep in mind positions move throughout the year as they interview more people and people confirm / deny seats. A decent amount of people in my class were notified as late as June last year that they were accepted. Lots of movement happens towards the end of April as the multiple acceptance deadline gets closer, so don't be too bummed if you don't get an official acceptance with this batch or the one in March as movement does happen pretty regularly in late April.
However, my class did NOT exhaust the AWPA list, meaning enough people accepted seats before getting to everyone on the AWPA list. AWPA means a pretty good chance of an acceptance but certainly not a guarantee. Good luck to everyone - waiting is the hardest part!