Actually, I didn't comment on his point at all, I commented on one of his arguments:
"Entitled "Love Live the Web," the Scientific American piece goes to promote the use of, yes, open standards. If you don't use open standards, Berners-Lee says, you create "closed worlds." Like Apple's iTunes. "Apple’s iTunes system," he says, "identifies songs and videos using URIs that are open. But instead of 'http:' the addresses begin with 'itunes:,' which is proprietary. You can access an 'itunes:' link only using Apple’s proprietary iTunes program.
"You can’t make a link to any information in the iTunes world—a song or information about a band. You can’t send that link to someone else to see. You are no longer on the Web. The iTunes world is centralized and walled off. You are trapped in a single store, rather than being on the open marketplace. For all the store’s wonderful features, its evolution is limited to what one company thinks up."
If you'd bothered to click the http link I posted rather than gut reacting you'd have noticed that he's completely wrong about iTunes. Can you index the entire iTunes store? Yes. Could you mash up the store data to change the presentation? Yes. Would this fall foul of the SIte's TOS? Probably. Are TOS for websites fair? can of worms.
Webpages are information, human readable and machine parseable, if a bit of info is on a publicly accessible webpage then it's on the web, indexed and sorted.