Okay but I can think of 5 teams, all of whom showed this behavior? Even if it is "team by team" that is not the same as what Google seems to generalize about itself.

Google historically was pretty chillaxed and let managers set standards for their team.

It sounds like now Google is going to be tracking attendance a bit more closely.

I don't think Google would be doing this if it didn't have data showing productivity had been suffering.