It's definitely not coincidence, but it's important to keep an open mind about all the possibilities. Participating with government requests doesn't make these

It's definitely not coincidence, but it's important to keep an open mind about all the possibilities. Participating with government requests doesn't make these companies any money. It must be a major drag, actually. It involves lawyers, tech people, and trying to strike an uncomfortable balance between user trust and trying to persuade a court that a request should be denied. This might be because they've been given a script, but it might also be because they chose to copy each other. They could copy each other out of not wanting to be "the odd one out." Any company that puts out a statement much different from the others risks being trusted less than the others. They could copy each other because they want people to jump to the conclusion that the government gave them a script (even if they didn't) so that people get more pissed than they already are. As others have pointed out, the similarity could also be because the PR/lawyer response to this is so cookie cutter. I think the "not wanting to be the odd one out" would be the #1 mundane reason, though.