Yep, mine has a VERY harsh shift when cold [no matter the outside temp, but in terms of engine temp]. Once the engine starts warming up, the shifts are nice and smooth, like they should be. The only way I have found to prevent this / improve it, is by moving it to neutral, then first, then reverse, and it seems to clear it up [my shifts are much harsher in reverse than the other gears, however it is still more than I want as far as harshness goes, in forward gears]. Also, just let the car idle for 30 seconds or so, in park. That will sometimes get the fluid flowing better, to make the shift smoother.
Now, as far as the question goes, if it'* a mechanical movement, it could just be something in the linkage? I am not sure how electronic the electronic trannys are, in the manner of if there is a linkage, or just a switch on the gear selector. Either way, hopefully some use will clear it all up