As reported on Slashdot: "[After recent spam filter changes at Gmail, Linux inventor Linus] Torvalds said his own experience [is] that around 30 per cent of the mail in his spam box turned out not to be spam."
I see lots of false positives in my own mailboxes as well, but I don't think it's really Google's fault. I'm on various lists talking about email authentication, DMARC, and so forth. Those discussions bring a lot of IT folks who often first implement DMARC in a way that practically begs Google to treat their mail more suspiciously. And a few of the lists are managed with outdated list management tools, that have yet to be updated to play nice with DMARC.
So I know I'm an edge case. I wonder if the same can be said of Linus Torvalds.