If you’ve read a story in New York magazine in the past year or two and thought to yourself, Who is this boomer whisperer who gets aging power-mongers to open up?, you were probably reading one of Shawn McCreesh’s dispatches, which cover everything from the Met Gala to modest book parties in “bad food” restaurants. Where did he cut his teeth, you ask? Well, as Pulitzer Prize winner Maureen Dowd’s “clerk” at The New York Times.