Google has been testing a new type search functionality: AJAX Search to make search result pages load even faster by only loading new information as needed on new queries. Google search are now serving up results in fractions of a second, and any increase probably will not be perceived in a meaningful way by end users. Does this speed increase really matters? The answer is yes. A move to shave off fractions of a second means more time saved, and more money.
Before Google roll out on a large scale, curious users can head over to the Caffeine test page here. The speed isn’t noticeably faster, but most users would be hard pressed to notice an improvement of a few milliseconds anyway.

