I'm completely unqualified to tell whether this guy has valid points. But Resig has led the charge on a Javascript library that makes my job dramatically easier and more fun. To gain the respect I have for Resig, Mr. Mark would have to do likewise, or contribute significantly to jQuery.
Or, to put it in more childish terms, "if you're so smart, let's see you do it."
Or, to put it in more childish terms, "if you're so smart, let's see you do it."