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To be somewhat fair, Apple charges any company to use that sticker, so it will most likely be reflected in the price to the end user. However, I don't think those prices are reflective of the actual cost Apple charges.
The whole idea of Macs vs. PCs is the cornerstone of Apple's success (to be fair - there were differences back when they were on PPC). They don't want people to know it's really PCs with Windows/Linux vs. PCs with OS X, because they want to justify the price difference as much as possible. That's why they want for companies to charge more for their "Apple-specific" hardware, it's the same with "Mac RAM" and a bunch of other products. A marketing gimmick is an appropriate word, yes.
 
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