"After several rejections, Diffee stopped trying to sell this cartoon to The New Yorker. Then his mom talked him into one last try."
Matt Diffee is interviewed on NPR and he talks about how hard it is to sell a cartoon to The New Yorker, saying, "90% rejection is doing good."
Go read and/or listen here.
Personal note: that Diffee cartoon has been on my Dad's fridge for years.