Hoping my info can put some minds at ease:
Yale - Had first interview last week. (I was notified in late Dec). The latest date I was offered was Jan 17, so first round at least runs through then.
CMU - Received an email today saying I never submitted my official transcript (OOPS). Hopefully some production communication coming soon! Email did mention that directing candidates would be notified by Feb 1
Northwestern - Received a rejection today. Womp!
VA Tech - Based on others' experiences, I don't expect to hear anything until April