I agree the above. At high altitude, there is not enough thrust to recover using power alone.
Extract from the B767 FCTM (paraphrased a little):
If ground contact not a factor:
Apply max thrust
Smoothly decrease pitch attitude to approx 5 deg nose up
Level wings
Accelerate to maneuvering speed for flap position
Stop descent, return to target altitude
At altitudes above 20,000 ft lower pitch attitudes may be required to provide acceptable acceleration
The page I am looking at is dated 1 Jan 1996, so hardly new.