"you can have mixed feelings whether the implementation of a 28-watt processor was really a good idea."
The reason behind the choice of processor is a very calculated and systematic one, which is something that Apple is generally known for. That choice of processor allows the Macbook Pro 13 to practically claim the title of "king of the hill" when it comes to benchmarks, as your own review showed. Never mind the real world difference in performance may not be very noticeable, the numerous charts and graphs showing the Macbook Pro yielding better numbers are very good justification for a customer, who is willing to pay the premium, to choose it over another product. That is called consumer psychology. That CPU choice gives Apple a dozen of charts showing the Macbook Pro ahead, while that same CPU is directly responsible for only one bad number (the battery time under load). That's why it is a systematic and calculated choice.