Did Facebook strike a deal with Bing?

It's hard for me to imagine that Microsoft's Bing is 'hyper-indexing' .... something that Google has been doing with select blogs and websites since last year.

About 7 hours ago, I (like so many others), decided to grab a Facebook vanity URL.

While running some SEO tests with Bing just now, I just noticed this :

 

While we know that Microsoft holds a small investment in Facebook ... Was there a deal here?

It's either that or Bing has made some significant changes since the name change from Live.com.