Defo check for Check Engine light - if it lights up at ignition for a brief moment - could be disconnected and car could be in limb mode.
4th and 5th gears will be lazy, had one myself for over a year. You need to keep the car above 3000rpm if you want fast response.
Your old 1.6 is drivebywire, while this is electronic throttle - they are a bit slower on response from nature, so nothing to worry about there.
Also, am I the only one who noticed bang at driver's side fender next to the headlight?