The problem is not how fast is the search, but rather how relevant is. But Google started it and everybody follows. Uuu, let’s index twitter. Why? Who cares about twitter? That is right, nobody. Is twitter relevant? No, not really.
So, Google chooses one more time the easy road. Rather than fixing his search results (don’t bother using Google spamreport or emailing Matt Cutts with some relevant problems, he has no time, he is busy twittering) and cutting into those seo practices, they choose more noise. More noise=more Google use. I can’t find what i am looking for! More Google!