Good points! I can see you're thinking far more critically about this process than I am!
I hunted around on ND's website for a while but then I realized the last year's calendar wasn't finalized until 1/25...so we may have a few days to go before we get a look at their schedule. After peeking at last year's posts on the "results" board, it looks like the CJA folks started scheduling interviews on Feb 4, so at least we know that they start making calls as soon as they've left the meeting.