Yes. For starters are you sure he was the sidekick? My first job had my boss drawing doodles in my interview while 2 other blokes asked all the questions. Later I found out that my boss thought I was ok before the interview but was contemplating not giving me the job because I wore tight trousers and white socks And he was doodling...Is this common
Also when I first started doing interviews I was the sidekick to my manager, who did most of the talking. Most of the time we were in complete agreement over interviewees, but a few times if we disagreed he would equally go with my thoughts rather than his. Got to delegate a lot, especially if your sidekick is younger and more in tune with uni grads.
And my first successful interview had one funny bloke and two miserable ones. Turns out the miserable ones were the ones with the real power. And you can't read anything from it.
Cheers