FWIW, during my "pre-buy research" phase with this car, I saw in more than one place that the "Sport" mode has more aggressive ECU mapping than the "Normal" which itself, has more aggressive ECU mapping than the "Bad Weather Mode." The same sources said that the other modes i.e. Track Mode has more to do with substantially reducing the "electronic nannies" that save our ragged butts (but potentially contribute to slower lap times) when our driving inputs are not smooth enough from getting the car (and us) into potentially serious loss of control. I believe "drag strip" mode (not counting line lock) is more for helping us to get the all important best 0-60 take off times possible - including special magnetic shock dampening programming....
For those of us who are either very new to this car, or lack very high level driving skills, "Sport" is probably the highest level we should go, especially on the street, or on tracks without a lot of run-off room. IMHO!