I think the author hits on a good point that he may just be too polite to really call out. A lot of developers get annoyed when designers use some framework to make building web pages simpler and then say they can build sites. This just seems to be the opposite reaction: devs using design frameworks to bang out their sites. Both should be lauded for making it simpler for people to get basic work done. Neither should be confused with what a serious professional can accomplish. When that happens, things get really weird. I personally believe the rash of web designers calling themselves Rails devs really screwed with the Boston area Ruby/Rails market.