Well, technically they could give somebody else better hardware, as long as your hardware is at least as good as whats advertised. One could buy a CPU that cant be overclocked beyond its default clock, while the other could get a CPU that can be overclocked by almost twice as much as the default clock. Can we blame Intel/AMD for that?Sure they haven't specified the minimum SSD specs that are included but it's not fair for someone to get a slow Samsung SSD when someone who buys one right after me, gets the fast SSD. If we're buying the same exact I5128GB, performance should be the same.
Make no mistake, if I were the OP, I would get an exchange too, but MS hasn't promised us anything beside it has SSD, and it clearly has an SSD, as promised.