The reason I went to 30 odd before meeting my first Inner Circle friend comes down to that.
Looking back I SEE in my sphere of influences, mostly school, certain people who COULD have been. A girl in high school, my prime example - evidence is I was aware of her as a DIFFERENCE, she was I am sure aware of me - given social adequacies, we had ONE very awkward conversation that felt at the time full of stuff I was not prepared to follow up. If we had been in the same place for two years after that talk, I think she would have been in there.
The difference with the ACTUAL first on the list - we were in a place with almost nobody else to talk to, she was conversing on topics where I had an in. A month after first meetup it was clear we were same species.
Age comes in, environs come in. I may spot a Like One across the room, but in most circs neither of us will buzz over and introduce.