I recently had some issues with throttle response as well. I'm fairly aggressive with the throttle most times, and for the first 7k miles or so, the PS transmission knew my driving habits pretty well. If I needed quick throttle, it used it, if I was driving slowly in a parking lot, it behaved properly.
After 7k though, it's been wonky. In parking lots (and I notice this the most after a fill up), a little throttle press, and the computer thinks I want to gun it, so the car lurches forward. Annoying, but it adjusts itself after that.
Also, recently, I had to pull out on a 60 mph posted road with traffic. Needless to say, I needed to put the foot down. Normally I put it in L, but that slipped my mind. But anyway, as I basically floored it, the car felt like it stalled. I had to completely back off the throttle and slowly accelerate.
I like the idea of the PS transmission, but I mean, if I floor it, why would the computer think the appropriate response is to not give me all of the engine's performance?
My next car will definitely be a manual, just need someone to teach me to drive one first

(I've only ever driven automatics, sadly).