First of all, I would like to thank you for all the materials you shared. It is exteremely valuable, the best out there! In my preparation I have used your video lectures, your mailing list for general advice, and MBA casebooks that can be found on the net for practice with friends. (I am graduating from my engineering MSc, so I am not in business school.)
I am applying to management consulting in my home country in Europe. I passed the first round at McKinsey and I was rejected after the first round at BCG. There was one piece of feedback common from both firms: "I was interviewing on a low energy level". They both said that they were happy I was calm during the interviews, but they would appreciate a "higher energy level".
Could you offer any advice on that? It seems quite vague to me, I guess it partly comes from my less extroverted personality, but I really want to work on it and give a good impression at the final round.
Thanks again for all the great work you have been doing helping the candidates!
Take a look at the following video. Most likely your voice is too monotone, which comes across as low energy, and boring. Basically, energetic is great pitch variation and great volumes variation (mainly the former).