A Nasa administrator was asked about the foam and he dismissed it. He had a foam sample on the table during one of the press conferences.
Pointing to the foam, he said he didn't think it was possible for that light a material to cause that much damage. I believe he said foam falls off all the time. They never noticed damage before.
Right now CNN is showing results of that test. It is a HUGH hole in a demo wing they have set up.
Now the question is. Since they always noticed foam fall off before on launches. Did NASA do multiple tests to see if foam falling off hitting the shuttle can cause damage?
Obviously not.