After years of reading Lefsetz, describing his work conjures the words acerbic, negative, potentially pandering, and usually right, so it's not often that one of his blog posts brings a smile, amused cynical chuckles maybe, but not a genuine feel good kind of smile.  
It makes his obvious respect for this young man rather special.  Lefsetz has a heart, who knew. 
btw .. I'm as impressed by Josh's parents as I am by him.