Who could replicate what Sully did? He realized he couldn't reach TEB. LGA was a stretch and an immediate decision had to be made. The river was the largest open space available. He choose it.
If anything he ran out of airspeed too soon. They impacted at 750' FPM with no flare(AOA limited).
The Airbus FBW would not allow him to stall the a/c prior to water impact. The threat of stalling a non-FBW a/c prior to impact exists. Old saying - 'it's alwyas better to fly to the scene of the crash then to crash at the scene of the crash'.
Who could replicate what Sully did? He says the answer is many.
He's a great spokesman for the profession.