I heard (or read) that they they were 2 min, 7 seconds behind another plane...
"NEW YORK (CNN) -- Investigators looking at whether turbulence from the takeoff of another airplane contributed to the crash of Flight 587 now say the American Airlines jet was closer to the leading jet than first believed, CNN learned Wednesday.
A senior federal transportation official said investigators believe the American Airbus A300 was only about 90 seconds behind a Japan Airlines 747, a much shorter time span than originally reported.
I find it endlessly amusing that people are offended/suspicious that the NTSB is even LOOKING AT something (wake turbulence) that just happens to be the ONLY thing specifically mentioned by the pilot in the last seconds of the planes' flight.