Gen II took some getting used to but became very easy. I was able to shift like a pro.
Gen III took a slightly different approach but became easier too.
For some reason, these 08 / 09 cars are the most difficult to heel / toe with. I'm getting better at heel / toe but the throttle hesitation (with Mopar race controller) and accelerator pedal location makes it tougher than the previous two Gens.
I still brake with the ball of my right foot and then rotate the side of my right foot over to hit the go pedal. Timing is off due to the hesitation and truly "rev matching" isn't what I'd call this yet, but with practice, you can improve.
Archer Racing says they can adjust the accelerator pedal position to improve this function. I'd try and catch them at a Viper Days event and have it done there. I'll catch them next year when they come back to CA and have them adjust my gas pedal.
Dan