Having lived with the lsd for a couple of years now I have drawn some conclusions.
Yes they do improve traction at the traction particularly in the burn out box.
On the street, it is not noticeable until you push it.
On dry roads, in a reasonably straight line both tires will spin and grip. If you do a sharp left hand turn, you can still get the inside left tire to smoke. If you do a sharp right hand turn, there is noticeably more traction and the front end will oversteer into the left hand lane.
On wet roads, it'* a different story.
Both tires will spin no matter what. This has the effect of sliding the front end similar to tail out power sliding in a rear wheel drive.....but this is front wheel drive
....so you really have to be more careful.
The one big benefit in the wet is before when I tried to accelerate quickly when merging into traffic, the one wheel would spin without much forward motion.
Now the whole car jumps over to the left with both tires smokin