My take on it is that Google is trying to advertise a well-paid fulltime position in their offices: "So you're an Open Source Dev? Surely you must be poor, thus: homeless, thus: here, have a blanket."
The main difference to other fluid grid systems is that the columns are not positioned based on the element to their left side. Instead the grid uses a system of negative margins to position the columns. The advantage is that the layout will look the same in every browser, independent of how the browser handles percentage and subpixel rounding.
Even well established grid systems like Susy suffer from the above, which becomes extremely noticeable when you have many elements in one row (i.e. 12 columns in a 12 column grid) and then resize the browser. Depending on the browser you're using, you'll see the columns "jump around" and be misaligned. My grid system solves that particular problem.
I am generally unable to comprehend the lyrics of most songs. For years I thought it was called "The Fire of Downtown" and was baffled when I found out it really was "The Final Countdown". In addition to that I am unable to understand anyone in (semi)noisy environments like bars, restaurants, etc. and am notoriously bad on the phone as soon as there is the slightest background noise on either end. All that, despite having excellent hearing when it comes to non-verbal sounds.
Until now I didn't even know APD existed, so thank you for mentioning and linking it here.
I somewhat "solved" this problem by marrying a designer. She might not be the one I geek out about code with, but she sure as hell understands and forgives long hours in front of the computer and appreciates when the final product performs well, looks beautiful and is easy to use.
At the end of the day I didn't marry her because of that though. If sharing a single passion would be the key to a successful marriage, I think we'd see whole lot less divorces and many more same-sex marriages.