Just to note: ECO mode doesn't limit the max acceleration when you floor the pedal, so you get the same "ludicrous mode" on demand. ECO only remaps the response of the pedal when you initially press it.
I don't know if it's that tiny lag involved in mashing the pedal, or if the claim of full power needs an asterisk after it, but it seems to me that Eco can't get to 60 as fast as Normal mode when floored. I suspect it's because the biggest difference in power is right at the beginning, and most people don't slam the pedal down fast enough to risk damaging it....