Neither did I say the bolded, nor is there anything amazing to the story, in fact it's all quite trivial for full-witted brains. Alonso claimed he could drive faster and once Massa was out of the way he proved just that. It doesn't get any simpler, I'm afraid.
You are right, it doesn't get much simpler if you start making up stuff that is. Alonso didn't say he could drive faster, he said “I am much quicker than Felipe [Massa]” . A world of difference.
Well, I'll explain it to you: total pit lane time includes pit stop time, making it a bit more relevant because of that. Not to speak of it being accurately measured, contrary to pitstop time. Consider this just another bit of data to help you understand F1 racing one day!
I will explain it to you. Pit stop time is the real measure of the screw up when something goes wrong. Case in point, the pitstop we are discussing. Massa was held a lot longer than the total pit lame time suggests.
Because... because... I don't want to.
And no, it's by no means certain Massa would have come out ahead of Rosberg with a stop as fast as Alonsos. It would have been closer, that's all one can say with certainty. To claim any more than that, one would have to know the snapshot time difference between the two at the moment Massa released the speed limiter at the end of the pit lane.