It's been 12 days. I emailed the recruiter after 7 days and that prompted no response by either email or phone.

It all makes me feel like I've done something terribly wrong, but I thought the interviews went pretty well. I have fully accepted that not getting the offer is by far the most likely outcome, but it still feels weird. Any thoughts on what might be going on?

This is also part of the MBA recruiting cycle (which would tend to be a well-oiled machine I would think), so it's not some off timing/special situation