sortnoxington.com, and Spam Blacklist question

My main spammer to my account has been from 'sortnoxington.com' for the past 
day or two.

I noticed that if I was using the JWSpamSpy blacklist, then these spams 
would have been blocked as according to this page:

http://www.joewein.de/sw/bl-log.htm

. . . this domain was added to their blacklist on 3rd May.

I am running MailWasher and have bl.spamcop.net blacklisting in operation, 
but as Sortnoxington.com domain wasn't in the list, the Spam mail got 
through. Does this (SC) blacklist operate at a slower rate than others?

Thanks
Chris