Will it delay the hit to the rear tire, prolong it,lessen it?
Ive never touched the front shock settings just wondering about the theory of it. I Understand there are lots of variables, but generally speaking a car at my level what could be gained,lost?

Generally what happens is ... you hit the pedal and
it loads the diff which hits the tires and tries to
rotate the diff (pinion up).. the front of the spring
is trying to lift the body(which is really trying to
push the rear end down)... as it is lifting its also
trying to move forward... if it can get under the
weight line it will continue to lift and move forward...
so now comes the front part of the car... if you allow
the front to lift, the car will be moving weight to
the rear of the car... if it doesnt move the weight
rearward you only have the rear weight on the tires
and on most cars the front end is heavier than the
rear so thats alot more weight to help plant the tires
so thats the general of whats happening(I didnt get
into the car trying to spin the diff in the car or
any of that stuff)remember that old scientific thing
of where there is a ACTION there is a equal and opposite
REACTION..... it applies to EVERYTHING

You probably won't see much change if you have very good 60 ft times that are very consistent. The front shock rate combined with front spring rate will determine the rate of front end rise and weight transfer. The "hit" (down force)or extra load put on the back tires that is artificially created by the suspension is momentary, and decreases very rapidly. The trick is to get the front rising at a rate that will keep traction on the rear tires as the down force from the rear suspension gets less and returns to what ever is there statically plus what ever has been generated by forward motion and rear end rise.
What is amazing to me is if you have enough torque and a trans brake, a car with a lot more weight up front can run as fast or faster than one with less up front. My car went from 50/50 to 53 on the front 47 rear and went faster because it could get up on the rear tires in time and not hit the wheeliebars as hard, which was reducing traction.