My Sienna has a drive by wire gas pedal too. It will rev the engine in park. However, even in a conventional vehicle it does make it feel different. The power band is much mellower lower down and when accelerating quickly extra power comes up almost like a flick of a (computer) switch. Definitely not the same feeling when your foot is linked directly to the air intake system.

Two climate control systems, one inside and the other at the tailpipe.

2007 Camry Hybrid (in service June 2006)
FE: 6.67L/100km or 35.3 mpg (6.11L/100km or 38.5 mpg in summer)