Here's some anecdotal stuff:
I used to have a job where we hired kids from job-training programs. They could do anything on the computer, but could not answer a simple math question (such as, What's 60% of 80, or 80% of 60) without significant figuring. One kid told me the answer was 75! Geography was even worse.
I used to watch a French TV show called Télématin. They were laughing at a cartoon from a French magazine one day during the Presidential campaign between George W. Bush and Al Gore. In the cartoon, a French teenager is telling an American teenager that France are following the U.S. presidential campaign with interest. The young American replies, "France -- where is that?"
It is not the kids' fault. It's the parents'. If we don't read to our kids or encourage curiosity and love of learning, they are left only with their peers.