Really neat site about Prosopagnosia :-) also known as face blindness. Some people can't recognize other people, even their best friends or themselves in a mirror! Great tests to see how you do compared with others:

http://www.faceblind.org/facetests/index.php

In the first "Recognition" set of 3 tests, in the face test I only scoring in the 28th percentile but scored in the 55th percentile for objects and somewhere inbetween both those for names.