After cutting the ribbon on his first New York boutique — designer Simon Porte Jacquemus zipped down Wooster Street, passing a block-long line that would persist well into the afternoon. (To say nothing of the cheering mob of raised iPhones that coalesced for the photo-op earlier.) He was thronged by publicists and security; a few brave souls darted over to match his stride, gushing and taking selfies.
“He’s like Jay-Z just walking in…