CVT hesitates when shifting into overdrive

[cuyoda]

I have an 07 Maxima SE with 9,800 miles on it. I have noticed that when I floor it from around 20-30 mph, the CVT seems to act a little weird. After pressing the accelerater to the floor, the rpm's will rise gradually from 2000ish to about 5,000- as if you asked the car to accelerate normally. It then will finally decide it needs to "downshift" into overdrive. Then the car takes off the way you need it to. All this takes a good full second. After years of driving normal automatics, this seems about a half second too long. It becomes noticable (and potonetially dangerous) when you are jumping into brisk traffic on the interstate.

(I realize my terminology is probably not accurate to the way the CVT operates, but I am descriptively comparing it to a normal automatic since I don't fully understand how the CVT works.)

I have heard that Nissan can tweek the CVT program to adjust for problems such as this. I have also heard that the CVT program takes time to "learn" itself. So maybe it is still tweeking itself? Should I spend the time to take it in, or would that just waste my time by them saying the famous dealer mechanic phrase of "its normal"?