I've just done a uni course in film and its cool to see some of the theory applied to games. This is a pretty well thought out argument, although I've only just started playing Portal, so will have to wait see if it holds water. Anybody know of any sites with more of this type of criticism. Gr should think about doing more!
Though this article is nearly two years old now, I find myself really wanting to comment on it, because the OP is clearly overanalyzing just about every aspect of the game.
I could mention how, for example, the Weighted Companion Cube was originally a normal Weighted Storage Cube, but playtesters frequently forgot all about it and were unable to solve that testing chamber, so Valve decided to stick a heart on it and had GLaDOS talk about it all the time. I could mention how the turrets were added to make the game more challenging, and to introduce a form of hazard that's slightly harder to avoid than both energy pellets and the gooey floor, but which nonetheless can be defeated. And their cute and adorable way of speaking is of course just a way of making it all a little bit more absurd, and a bit more memorable.
But instead, I'm quite content to ask a rather simple question: what does the fact that GLaDOS is a deranged and homicidal lunatic, who killed everyone at Aperture Science, say about women?