The trouble is that sometimes (especially in on-line sales) it's hard to make this obvious. On paper (=screen) all the specs look the same. You only see the difference in your hand, or worse, in actual day-to-day use. Not everybody takes the effort to go through forums and endless reviews to find out if there is a catch, what it is, etc. Brand helps, but if you say something that you either have or you don't (like iTunes) that's much harder to hide under the carpet then something as elusive as wifi performance.