USC Admissions question

Does anyone know if USC sends acceptances and rejections at the same time? And if so, do they do it in waves? Because some of my friends have been accepted as of today (through mail) and I, along with other friends have yet to receive anything from them. I was wondering if this is a common occurrence or if I should be a bit worried. Thank you

*USC mailed “admissions decisions” on March 24th. (I don’t know if this includes rejections)

@trevorj1309 - My understanding is that acceptances are sent Priority Mail in large yellow envelopes and denials are sent First Class mail in white envelopes on March 24th. Therefore, yours is still in the mail, but no way to know which one.

Thank you for the quick reply. I’m just worried that priority mail would have arrived today, whilst first class mail, aka the rejections, will come tomorrow and Friday. Is that an irrational fear?