But other people have. Privacy-minded individuals seem to be mostly okay with v2 but v3 crosses the line in terms of tracking for many.

definitely prefer waiting for a few seconds instead of training google AI

It seems pretty variable for me. First time I tried it, took 6 seconds on a two year old Macbook Pro (2.8 i7). Tried again and it took 18 seconds.

What version of google's captcha do you use?