Blog post refutes old writing bugaboo

As an editor, I'm vicious about few things. But something that I'm pretty serious about is the use of "more than" instead of "over." I was taught by editors much smarter than me that they're not really synonyms. But now, this annoying New York Times blog piece refutes my whole argument.

I guess I'm not sure how I feel about this. Is it wrong to want to hold onto the few rules you actually believe in?