I don't know why I've been getting it all of the sudden. Best I can reason is probably because I'm inside a tech company and we search for strange things that aren't celebrities and such so the system thinks we're robots.
I've read it's been out and others have had problems for a bit but maybe they changed and algorithm or something lately that's a bit too aggressive. Or I've got something on my laptop (or somebody else on the network) that's doing too much chatter to Google. I'm pretty sure it's not just me though since in the last company network it happened in pretty much everyone that day started getting the notice, and a few had it before I got it.