New M6 Owner in DC Area

Hi Everyone!
I just purchased an '07 M6 a couple of days ago with only 19K miles on it, and am still getting used to this fine automobile. I traded in my '09 Cadillac CTS-V for the vehicle, and the M6 will be my daily driver, as the CTS-V was. I also own an '09 GT-R with a Stage II mod, which I drive two or three days a week. As part of getting to know the M6, I would like to get in touch with other M6 owners, who can provide driving tips. I am accustomed to driving in manual mode and shifting via the paddle shifters on my GT-R, but on the M6 there are other options and considerations. I am trying to figure out why the car hesitates between gear shifts. I believe the shift points can be configured. I know after time I'll figure it out, but helpful suggestions would be great. Oh, by the way, I live in the DC area, in suburban Maryland.