Congrats on doing McK Final round!
Don't worry, one week is typically the standard to hear back from the interview and get validation. Timing to receive a response depends if you were interviewing at the same time as many people, and if there were strong candidates.
A fast answer might be great or bad - the fact that you are still waiting means recruiters still be finalizing their choices. Take it chill and wait out - if you haven't heard anything on next Monday, ping the recruiter to ask if there are any updates.
Hope this helps and that you get a positive response soon!
Nicolas Vilmin from - Vilmin Coaching (Career & Consulting Coaching)