Some more insight
Although I agree that April is as good as any month to receive your big blue envelope, I could not help but become 10x more anxious for notification when April 1st arrived.
I e-mailed my B&G officer today to inquire how my chances fair in the last month of the admissions board. To my surprise, he informed me that the window between April to the END of May is used for filling the quota. That means as appointees decide not to attend the academy and return their appointments, the admissions board will send out more appointments to fill their quota.
I do not know what this means in regards to notification before the 15th, all I know is that there is still plenty of time to find out good or bad news.
I interpret my position as being wait-listed. It isn't guaranteed appointment but neither is it guaranteed rejection. Let's stay optimistic!
Good luck to everyone!