This Diner's Journal blog post enumerates how there are
Since November, here in Montreal, Le Hachoir and Lawrence have opened. If we go back to September you can add Burger de Ville (Mile End) and Jukebox Burgers to the list. If we go back to July (five months ago) add Brasserie T!, Hielo, Tagada, Le Plaza, Chez Ma Grosse Truie Chérie, Chez Victoire and I'm probably missing a couple as well.
[Edit 12/24 14h30: In a major red-faced moment, I forgot the biggest of the burger joints opening in town; Five Guys.Apologies, Mea Culpa and thanks for the reminder.]
Take that! NYC!!