Yes! LSD's play a big role in this. I've tried setting the front harder which resulted it coming out of the turn faster but when it stables itself, it pulls itself straight, and understeers when it get up to speed. You can pull yourself back in line and get smooth neutral drifts then pull straight. This will probably help in tight tracks because it's makes the car very stable while exiting. BTW, it was set like a 1-way LSD. This was done so too see if it really helps as I heard from a Rally Tech. who works for Subaru Rally Team USA.
The setting that I have right now that works fine with me is having it not in effect as much. In fact I have the front set half as to the rear. This helps in high speed turning as it frees the front wheels more.
You'd want the rears to have as much LSD effect as possible because you want both to have more slippage to induce some oversteer when you lay down the power.
My LSD settings:
Initial f/r: 13 / 23
Accel f/r: 23 / 45
Decel f/r: 5 / 23
NOTE: The front is set like a 1-way while the rear is set like a 1.5-way LSD.
Your suspension also plays a role in performance. I have my rears set higher then that of the fronts. 15.7 front, 18.7 rear.
Dampers I have the rebounds set to maximum. For the front, this helps reduce front-end lift. The rears, helps in braking. The Bounds are set 6 front, and 9 rear. The fronts are to soak up all the bumps while the rear hops over them to get the rear end out. Also because it's harder, the rear take there place faster which helps out in vehicle control. It also has to do with traction too because your moving the weight via steering to one side of the tires faster which upsets the traction limits and that give it slippage. Think of the Traction Circle that was seen in the GT2 book.
One more thing. Toe also helps in exit. If the GT series engineer stuck in the toe effect that the Imprezas have, then you'll have to set the toe on them. They say the toe in the 2nd generation Impreza doesn't change as much as the 1st generation Impreza, but with force acting on the suspension, the toe will change a tiny bit and that can result in poor performance when at the limits.
My toe setting:
front/rear: +.20 / -.20
Note: They say with toe out (negative toe), it makes your car oversteer. This is true until the car settles and that's when it's faulse. The reason they say it because the rear will lose traction first due to negative toe wanting to track out or pull out. It make the vehicle very responsive, and this leads to how fast weight transfer when you steer, just like dampers. This is more like shifting the weight there faster than say dampers trying to resist fast spring movement during bound.
With the fronts set at toe-in, it helps upon corner exit and stable corner entry. The rear with toe-out helps in off-the-throttle steering, corner entry and exit.
Hope this helps, you all can refer member to me as I've been tuning Subies ever since GT2.