I think that is probably programming for the A10. I remember it takes a good 1k to 2k miles for those transmissions to settle and learn how to shift for the s550. Plus the DH is a track car so it doing that in the 1/4 mile is a bonus.
Yep 100% the Dark Horse is like the Mach 1 / GT350- none of these are drag cars...they are all track cars so I am with you 100% - the fact they are quick in a straight line is a bonus
And yes- I owned an S500 PP1 A10 prior- while drag mode worked right away- normal daily driving took some time for it to learn - sounds like the programming is MUCH better on the S650 though