If you are doing anything but loafing around at 2000 rpm, your best bet is to get used to the habit of releasing the throttle and then pressing, as desired, somewhere at or beyond the 50% range, when you need more umph out of the engine. Don't bother with 0-50%, and don't be subtle with your foot motions. It's just the way that whole electronic throttle is programmed. You got to let it know you mean business from the get-go, or it is just going to take an "eternity" to disengage mds, disengage the converter clutch, drop-down a gear or 2, and then finally whip the engine into a frenzy. If you really want immediate output, you simply need to kickdown the gear yourself and start at somewhere around 3000 rpm, rather than 2000 rpm. That's just where these hemi's are tuned to "get out of bed".
Here's something you folks may be interested in.....One of my employees buys a 2011 Dodge Charger R/T and tells me to get in and drive it. Ok, so I do. Right away I notice that there is no feel in the MDS kicking and out. I tried to simulate the way it does on my car but it wasn't felt like on our cars. It felt more like a carbureted type of response. I just could not get it to drop to MDS and back in the time I drove it. The car didn't feel any faster, but the throttle felt more in tune with me pressing it.