https://blekko.com/ws/mop+legendary+%2B/wow
1) http://www.mmo-champion.com/content/2806-Mists-of-Pandaria-B...
2) http://www.wowhead.com/news=204099/mists-of-pandarias-first-...
3) http://wow.joystiq.com/2012/05/25/mists-of-pandaria-new-wrat...
It does better (at least as far as the first result or two go) when you don't have to guess the acronym though:
1) https://blekko.com/ws/tier+14+sets+%2B%2Fwow
2) https://blekko.com/ws/challenge+mode+sets+%2B%2Fwow
For more standard searches it is okay, but DDG/Bing and Google are better. In these results I especially like potstuck and fabien potencier posts.
1) https://duckduckgo.com/?q=php+dependency+injection+container...
2) https://blekko.com/ws/php+dependency+injection+container+exa...
3) https://www.google.com/#hl=en&safe=off&sclient=psy-a...
It is nice to see alternatives developing though, should the day ever come that I want to leave Google behind!
https://blekko.com/ws/mop+legendary+%2B/wow