A lot of the post WWII Boeing manuals referred to takeoff and landing techniques from that era. Even to rotation techniques from the Dash 80 were incorporated into manuals up through the 80's which did not apply to better performing aircraft.
Rotating a fully loaded -900 with derated thrust to 24k at 3 degrees per second to 15 degrees nose with an OAT of 38 degrees will result in a tail strike.
FCTMs need to be updated to meet actual handling and performance for the the respective aircraft to which it applies rather than generalizations as they were in the 80's and even 90's for that matter.