Bing's Penguin?

Sudden massive drop in page position.

[Wilburforce]

Yesterday my site dropped from page 1 - where it has been for years - to page 8 in Bing results for main money search term.

This had already happened on Google with Penguin.

Is this some sort of Penguin equivalent?

[Wilburforce]

OK, probably not, as it is back on page 1 again after a 48-hour relegation.

A lot of pages with <key phrase> in the domain name seem to be dominating the first few pages now.