You know how car manufacturers publish fuel economy and emissions figures, and how when you test them in the real world they're nothing like what they claim? Auto makers study the test regime and they tune the car to perform optimally for those tests. So the test measures fuel economy at a steady 56MPH? Let's put a small flat spot in the engine mapping code around there to reduce fuel consumption.
Apple will be doing the same with power consumption based on specific usage scenarios.
So for me, even if it is anecdotal, circumstantial or whatever - I'm always going to go on peoples real world experiences, and 3rd party reviews rather than the 'official' pitch.
The point is that people have been reporting good, okay and poor battery life. It's not as though the entire MacBook Pro user base has been unanimous in condemning it for poor battery life.
So why are people assigning so much weight to the few reports of poor battery life while seemingly ignoring all the reports of positive battery life estimates?