Laggy throttle

Ever since the first couple of weeks of ownership, I've noticed that the throttle response on the Genesis is a bit laggy. After almost 2 months, I've narrowed down a common scenario of when the throttle/transmission decides to fall asleep. The most obvious moments are when slowing down to a crawl, e.g., not quite coming to a full stop, and then pressing the gas pedal results in about a half a second delay and then a pronounced kick in the back from a very sudden and unexpected surge of power. Looking at the tachometer, the engine speed increases ever so slightly when I press the gas and then jumps up to 1500 rpm or so. It almost feels like the transmission is slipping and then catching, but if the transmission was really slipping, then the engine speed would not creep and jump suddenly (at least I wouldn't think). Again, just qualitatively, it feels like the transmission is in the middle of downshifting to 1st when I apply the throttle, and once it gets into 1st, it surges forward.

As an experiment, I've tried going into manual mode and this problem seems to subside for the most part, but it's a bit unclear as to whether manual mode solves the problem fully. I tend to think this may be a transmission logic issue and a dealer reflash may be necessary. I'll find out more this Saturday when I go in.

UPDATE: So I paid extra close attention today to this issue and I could not quite duplicate this behavior for some reason. I'll still go in and ask the service tech and maybe even try to test drive the same car on the lot for comparison. Stay tuned...