For some reason this article reminded me of this old TV segment that was hosted by the Genie from Aladdin. The title was "Great minds think for themselves." The title always stuck with me (along with apples "think differently" slogan) in that no one thinks the same. A group of people may approach a problem the same way, but there will never be one true way of doing something. This is why I think it's important to get external feedback from people totally unrelated to you. Sure it can be painful, but feedback almost always helps, I mean heck it's the entire philosophy behind web2.0.
Anyway great article and great responses here.