Considering John Resig is the creator of jQuery, which is open source, yes, he's probably more interested in someone who's familiar with the OSS development model, tools and methodology and can prove it.
His criteria don't (and shouldn't) apply to every SW hire, even though it's clear his message is "demonstrate > declare".
His criteria don't (and shouldn't) apply to every SW hire, even though it's clear his message is "demonstrate > declare".