I have to agree with Nathan - 'Premium' has little to do with actual performance in this class and more to do with perceived quality, brand image, and excusivity (i.e. snob appeal) as well as interior feel and wow-factor, followed by on-road driving pleasure. And not necessarily in a performance mindset but more the luxury 'coddle you' mindset of driving pleasure. No matter how good the Subaru is, it doesn't compete based on the 'snob appeal' factor. Just ask Toyota about this - that's why they started the whole Lexus thing. Nobody wanted to pay big money for a Toyota, but slap a different badge on it and suddenly it's a desirable name even it it's little more than the same car that's sold across the street under the doughboy sign but with nicer leather.
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I also find it funny to hear everybody complaining about how uselessly small all these different vehicles are. Welcome to America, land of the Big Gulp! Personally, I like a smaller vehicle for most applications. Not everybody wants to haul around 4-5-6 kids. We complain when we don't get the cool European stuff, and yet we complain when it does come her that it's not super-sized. Go figure.