[Tech] Does the Yahoo! Mail spam filter even work?

Seriously.

Gmail works fine. My SpamAssassin setup for my ISP mail at home works better. I still get 30-40 (out of 100) mail messages a week that are spam and that are not caught by the spam filter and moved to the junk folder. On Gmail, I have had 0 (I can't believe it either) spam messages that were not caught and moved to the spam folder.