Most definitely. L. Gordon Crovitz published an article today in the Wall Street Journal and mentioned a new book called "Distracted: The Erosion of Attention and the Coming Dark Age" by Maggie Jackson. The book sounds fascinating. Crovitz says author Jackson "warns that the cumulative effect of new technologies is that we may be losing our ability to maintain attention more generally. Attention requires focus, awareness and what she calls executive attention."
Relying on multitasking as a way of life, we chop up our opportunities and abilities to make big-picture sense of the world and pursue our long-term goals," she writes. "The way we live is eroding our capacity for deep, sustained, perceptive attention--the building block of intimacy, wisdom, and cultural progress. Ms. Jackson concludes that "as we plunge into a new world of infinitely connectible and accessible information, we risk losing our means and ability to go beneath the surface, to think deeply."
Check out this Amazon review.
On the same subject, do read "Is Google Making Us Stupid?: What the Internet is doing to our brains" in the current (July/August, 2008) Atlantic Monthly.