No, but in some neighborhoods as many as 15% of the homeowners are.
Is it because they're not repaying their mortgages according to the terms of their loans? I have no sympathy for welchers, flakes, and people who over extended themselves. But I guess the holders of mortgage-backed securities will take it in the chin because of misplaced blame, populism papulism, and otherwise falling for the trap of doing good for the unfortunate of our society.