I think the primary/secondary debate will go on forever, but there is one fact that can not be argued; the number one enemy of a fermented beer is oxygen.
For all the reasons someone can cite as to why they feel the need to move the beer off of the yeast cake prior to packaging (autolysis, clarity, etc.), none of those reasons outweigh the simple fact that any additional handling of your beer will needlessly introduce oxygen, and oxygen ruins finished beer. Leave it alone - minimize oxygen. Handle the beer - introduce oxygen. Additionally, the "bonus" handling takes up valuable time, and gives another opportunity for poor sanitation to rear its ugly head. Even if you are extremely careful, and dodge the sanitation bullet, the oxygen is still unavoidable.
For those two reasons alone, the negatives of moving to a secondary outweigh any claimed "benefits". IMO, the additional transfer is all risk and no reward....but some people feel otherwise.
Joe