I don't know why, but quotes like that always leave me feeling a bit disappointed. It may be nerdy and fanboy-ish, but I like to at least hold onto the illusion that a show's creators aren't "making it up as they go along." (At least, not entirely). I guess it doesn't matter in the end if they manage to tell a good story, and not everything has to turn into a mythological cluster-fuck like Lost, but I prefer to think that when they start making sly intimations about a character's past (as in Gus' case), they at least have some (substantive) idea what they're talking about.
One thing I've always wondered about backstory-wise, for instance, is the Gretchen & Elliott situation. A lot of people have told me I'm crazy and that it's never gonna be brought up again, but I really hope they finally get into that this year. At the same time, though, I wonder if there's even any point, if the creators themsevles don't know what the story is, and whatever we get in the end will be something they whipped up at the last minute. I've always suspected that story contains a big piece of the puzzle as to why Walt is the way he is, and why his station in life was what it was when we first met him at the beginning of season one. But how can that be, if the whole thing is just a big ? the writers decided to throw at the screen, for shits and giggles or whatnot?