One friend of a friend of my fiancee survived because he overslept his temp job in the WTC -- lucky day to be a slacker.
It was a bit before 9:00 at least, and those below the impact points seem to have got out of the buildings much faster than they did the first time. Still, 7,000 is a mind boggling figure but, as you point out Yoj, it could have been much worse.
Charon