randfish, started a very interesting thread over at Search Engine Watch Forums named Banned by Yahoo! - A good thing? The story is that one of his clients (or maybe his site) was banned by Yahoo! for being perceived as being spammy (probably has to do with Yahoo!'s overly aggressive duplicate content filter). Their rankings drop in Yahoo!, but the client (office managers) have no idea. In fact, the client calls randfish and asked him, "how did you manage to filter out the bad requests?" In fact, the randfish tells us that his client claims "it's been great for productivity so far."
(1) Does Yahoo! provide less relevant referrals in the commercial real estate market? (2) Do "spammy sites" make for less productive office environments? (3) Does Google and MSN provide better results then Yahoo!? Even though, so far, our tests show that Yahoo! is the most relevant.
This should make for an interesting thread.