I finished my McK final round interview on a Friday afternoon (which is the day before yesterday - today is Sunday). I applied to the NYC office, and my final round interviewers were one senior partner from the San Francisco office and two junior partners/partners from NYC office.
I thought I did extremely well with the SF senior partner, well with one of the NYC junior partners and not so sure about my performance with the other NYC partner (we did not chitchat at all at the beginning - he dived right into PEI; he also didn't ask any follow-up questions during my PEI and I had to go on with my monologue for about 2 -3 minutes, and then he quickly decided to move on to case... during the last calculation question in the case, I initially did not understand his question and he had to guide me through... but when I eventually understood and told him where my previous misunderstanding was, he said that he potentially phrased the question wrong at the beginning (he's not a native English speaker). So that was roughly the situation of my final round.
I haven't heard anything back since the interview and am wondering how long it normally takes for candidates to hear back after the final round? I am also wondering if there are disagreements between partners about whether to hire a person (which I think is highly likely in my case, given that my performance was at different levels during the three interviews), what would happen?