Fifteen Years In, Google Revamps Its Search Algorithm - Liz Gannes - News - AllThingsD

More Hummingbird non-details...

"Google has “changed engines midflight,” search leader Amit Singhal announced today. Not that anyone noticed, or that Google can even describe what changed in layman’s terms. But, about a month ago, the company swapped out its search-ranking algorithm for a new one, code-named Hummingbird, that can handle more complex queries faster.
“People are trusting search more,” Singhal explained, so Google users are asking longer and more complicated queries. Where the Boolean this-or-that style of search used to work fine with words and documents, it deteriorated with concepts and relationships, Singhal said."

Fifteen Years In, Google Revamps Its Search Algorithm - Liz Gannes - News - AllThingsD