Stuff White People Like is a sardonic little blog that pokes fun at the white-bread ways of the middle-American/Canadian pseudo-elite. (It's that same blog that recently got a six-figure advance to morph itself into a book.)
Although it's always dangerous to stereotype, at least 16 million people have been able to suspend their outrage long enough to get a chuckle out of the site that profiles all sorts of different things that white people generally agree it's cool to like, such as New Balance Shoes, Starbucks, Obama, Having Gay Friends, Shorts, Dinner Parties, Study-Abroad, and Recycling. So I guess it was inevitable that they'd eventually get around to Grammar.
The post talks about how white people love rules and following them, love finding mistakes in publications (it makes them feel superior), and can't resist it when you ask them to proofread something for you. Funny stuff!