Afaik the last 3-4 are actually largely his personal projects that he probably built most of himself. But yeah, kinda agree for the other ones, the phrasing feels a little self-aggrandizing to my ear. Not sure how intentional it is though, that kind of phrasing I think sort just sneaks into the lexicon for some.
Have you found Googlers to be self-aggrandizing on average? That's not been my experience working there. (But might be different for "Googlers who talk a lot/are well-known publicly".)
