Castor, it is slower because as opposed to changing search results being built into google pages, now changing search results is a separate loading process.
It might just be me. But, i believe others share my concern over the internet becoming less and less speedy by replacing the good working stuff with more bloat. Bull**** like 100% flash websites, javascript, overuse of graphics, and when flash became a video codec (i have no qualm with advertisements because those actually help websites). And the excuse for this stuff is that most everyone has broadband. And since most everyone has broadband, it's been content overload on the increase every year. But, when you have broadband and it still takes forever to load up a site, you totally know that the advertising of the broadband company for websites appearing instantly is false because of the additional bloat in todays sites.