Google wasting 200 gigs of bandwidth a day?

Even though the analysis has flaws, content optimization + content compression are distinctive. See the source for AdSense:

http://pagead2.googlesyndication.com/pagead/show_ads.js

It’s already quite compact before the webserver gzipped it further. I don’t believe that is the same javascript version developers are viewing internally, I imagine they would see comments and meaningful function names.