Interesting read. Note the "Google Confidential and Proprietary" at the bottom of most of the slides. I wonder if the author just forgot to remove the notice when the slides were made public.
The guy probably gave it as a lunch-time talk at Google, and their default slide format adds that footer. Google seems worse than average in terms of compulsive secrecy, but hardly unique IME. Labeling a summary of a public ChangeLog plus a few benchmarks "Confidential and Proprietary" is just what people do these days. But this seems kind of sloppy, especially if he's reciting from a company slide deck (I've seen Googlers do this even at respectable academic conferences).
Seems a bit sloppy on their end and ripe for social engineering trickery. If an employee is debating publishing/sending something labeled "Confidential and Proprietary", but then sees a dozen of "Confidential and Proprietary" documents in Google-approved public repositories, they might lower their guard on what the words actually mean.
