Hi everyone,
INSEAD typically starts calling people about their acceptance around 10 days before the date stated on their website. So, most likely, around Monday or Tuesday next week, the first calls will be made. They tend to leave the rejections towards the end, so most rejections will be sent on November 15th-16th. Waitlist notifications can be sent at any time during the next two weeks until November 16th.
They prefer a phone call for acceptances (this is the famous +33 call). Though, some people find out by email (this was my case, actually). Waitlist notifications and rejections are sent via email.
The date of your interviews does not affect the outcome. Whether you had your interviews a month ago, yesterday or tomorrow does not impact the admissions decision. As a matter of fact, I have worked with several applicants who were interviewed just a few days before getting the +33 call. So, for those who recently completed the interviews or still need to complete them, don't worry

I hope this helps, and good luck to everyone!
Warm regards
Alex