Google's lawyer responded by claiming they do follow that policy normally except when their lawyers nearly miss the "artificial deadline set by the government" and sometimes send it out same day.
I'm curious if this was a common issue or Google's legal team was flooded with subpoenas during the first months of the administration during their deportation surge (they did around 100k removals around that time). Homeland sent the request to Google a month prior to when they released the data and notified him, so they had time to notify, but it clearly isn't an automated thing.
The problem is they tell user that they'll inform you right away and give them a chance to challenge the subpoena.
A quick search shows that they've done in the past and people have been able to get the subpoena's withdrawn.
https://thefulcrum.us/rule-of-law/us-administrative-subpoena...