One-to-one is certainly better than the stock ETC. What I'm saying, though, is: if you had a true throttle cable (as opposed to ETC Off, which tries to simulate a physical throttle cable), you'd still want to change the cam(s) at the intake butterflies to re-shape the pedal response to be more optimal for track use. With just ETC Off you get no possibility for that kind of adjustment.
I went ahead and scanned from the book that got me thinking about this. Pg 36 of "Think Fast" by Neil Roberts, which illustrates what I'm trying to say:
