I thought this was a useful article for a beginner, and sent it to my son who's a jazz pianist in NYC. instantly I get a text back saying he knows the writer —

I thought this was a useful article for a beginner, and sent it to my son who's a jazz pianist in NYC. instantly I get a text back saying he knows the writer — Dan Tepfer — and is indeed going to an Alan Hersch performance with Dan later this week. I had no idea...