So while the first one took 3.5days, the two additional jobs that I submitted during that time all finished at the same time. So it was clearly doing some sort of batch processing. I messed up internal signing so had to restart. New submission took roughly 6 hours. I also submitted a tiny test file which also took the same 6 hours. So again - supports the batch processing theory. Anyways, new build for Intel only took 15 minutes or less. I walked away so the times are definitely improving for me. Just posting the update for others looking into this.

Thank you for the reply. I appreciate the more indepth answer and the timeframe. I must have missed some files in mine as I just received "invalid" on all my files after 3.5 days of waiting.

wild. And Apple gives the same auto response no matter what to these posts. Very disappointing. I'm almost at the 3 day mark now. If either or yours finishes please update. Apple - give a real response and fix it.

Literally in the exact same boat. First time apple developer. Submitted a roughly 30mb file and it's almost at 24 hours. Hoping you get a response here from a mod. I'll be posting in a second as well.