Quote: The only thing FI can do that a carb can't is to be able to make changes rapidly.
Yeah, but that's not 1 thing, that's like 1000 things - per second.
EFI can turn the fuel off completely on a downhill coast, then turn it on so seamlessly that you'd never know -- unless you saw it on the AF or MPG gauge. There's a 1/2 mile long hill on the highway where I usually get 150+ mpg for 30 secs. Try that with a carb. With a carb you're at closed throttle, high vacuum, and pulling fuel thru the idle circuit.
