I still get a few spams in my gmail inbox and I still get actual email going to the spam box. I'm on a ton of mailing lists and I have it set so everything sent to my domain goes to gmail.
I have my domain registration email set to dead_babies@ which is starred when I get those. Those almost always go to the spam box and they hardly show up but it makes me laugh when I get them.
Part of the false positives are probably my fault to occasionally responding to the "we should swap links" with "sure, would you like to be on the page about necrophilia or the page with the naked girl pinning Marshmallow Peeps (tm) to her vagina?
I have too much time on my hands sometimes.