No Jasonbar, Mystic is worse!
Here is my "screenie"
Non leachy "legal" score of 32,500 and then a bit leachy "non-legal" score of 42,280 (on last car I just hung out in the volcano).
Technically I would say it's probably not leaching cause it does finally start to speed up but you can gather a lot of points. On the other hand if it's not fun then whats the point.
Couple things I've noticed, You can't land on the Joker building in stage 1, watch entering stage 2, if you haven't killed the crazy skull car he has a tendency to carry over into level 2. You can ride the water shoot out of the volcano level if you time it properly but not worth it as there is no bonus. In the sea level, if you are to close to surface, bird will drop second bomb, which usually you can't avoid.
Who all has made it past the sea level? Are the last 2 levels even harder?