...so, it at least seems plausible to me that Apple may be setting the prices for their PCs and "post-PC" products more correctly than most of their competitors. Even if that's true, the Apple Tax could still be a thing -- but the premium may be magnified by the "lose money on every unit and make it up in volume" tactic so many PC makers seem to have had through the 2000s.
Also note that not all parts that seem comparable are. For some parts like LCD panels that have more variance in quality, Apple has deals with suppliers to get the best panels while Dell and others have to buy the ones that don't hit quite as stringent QC.
Both of these are why looking at margins alone doesn't give you a complete picture.
Not just hating here either. I've owned numerous Apple machines, and still use a Macbook (with Ubuntu).