Is the polish wearing off of Google's shine?

A spat of stories coming out here and here about how Google is no longer the greatest thing since sliced bread. My personal opinion is that this was bound to happen eventually, it’s actually taken longer than I expected.
I saw a story a few days ago that I wished I had saved mentioning that Google doesn’t have much to fear from Microsoft or Yahoo. That its biggest problem is going to be itself. Whether it can digest all of the new employees and maintain the culture and internal systems that allowed it to get where it currently is. The company is still wildly profitable, but Wall Street is almost never reasonable and they expect Google to make more money out of the money they’ve already made and that’s just going to keep getting harder.