Please be careful MeToo. Those rims are +52 offset. Stock rims +46 offset. Ask Mr Google and use the tire+rim comparator before you decide, if you have not.

MeToo, i think he is trying to say that the car squats a bit, and always raring to go. Meaning the car now has better torque, pulls our body back more to the car seat ( as if like after a mini turbo lag sensation). Not a wheelspin , i think. (wheelspin normally happen after strong power pull, when car initially stationary).

I think Kenny has done a lot of work on the 2k to 3k rev band, specifically to gain a lot of torque, compared to stock settings. That is very useful really and i commend him for that. Predominantly, those bands of rev are the norms that we are at , in daily driving.
FYI, i have the same feeling too now, as what JackNg describes.

I do not think there is any harm to be in that scenario of things. I could be wrong.

gergaji=saw
gergasi=giant