Neither did I. I'm just going off what BatmanForNever said.
I mean look at Batman's first appearance in 'Begins' for instance, as opposed to his first appearance in 'BATMAN.'
In 'Begins' Batman moves in the blink of an eye. You only catch glimpses and he takes out Falcone's men like a bolt of black lightning.
On the other hand, Keaton allows the full effect of his appearance sink in, but he still does the job quickly.
BatmanForNever probably thinks the method from 'Begins' is more 'efficient' because Batman didn't take the time to allow himself to be seen as he had in 'BATMAN' and he just went about his business.
I personally prefer his first appearance in 'BATMAN.'
CFE