There's no shame in using MDM, and in fact, the most advanced racing series have allowed it for years (ala F1, for example). I think whether or not MDM helps or hinders lap times depends on the track. I'm a pretty accomplished driver and racer, yet I could not turn faster laps at a short track without it, and this is my home track (BeaveRun - have had several lap records). However, at a wide-open track (VIR), I have turned faster laps without it. I hope some of you aren't confusing MDM with DSC, because there is a world of difference between them. With me, MDM has never interfered obtrusively, in fact, sometimes I forget if it's on or off. Maybe I'm just that smooth
Now DSC, well, there's no question when it's doing its job.