I think all this proves is that when you have your foot on the gas and brake pedal at the same time the car's computer is making better choices than the driver. I understand your attempted test criteria, but unless you have source code for the computer to say that regenerative braking algorithms are not affected by gas pedal position, this test doesn't prove anything. Even though you may be gliding, that slight pressure on the gas pedal would still be registered by the computer as a "non-zero" input.

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)