I got the haldex tune done and my engine/dsg updated.
IMO, the haldex tune doesn't seem to do a whole lot from a stop. I did a video before and after and both times my fronts just light them up. MAYBE after, the fronts don't spin as hard, but I am not spinning the rears at all off launch.
In turns the car feels much more planted. Understeer is virtually eliminated.
I'm considering adding the haldex tune when I'm in the shop to get my tune updated for a downpipe, and based on whats been said so far I think your experience is about right.
Unless you were already experiencing issues from traction loss during a launch before (early upshift to second, etc.) I doubt you'd notice a big difference. I think this tune in the launch direction is really going to help big turbo cars, and I'd bet that many of the fastest UM cars have had this tune for a while.
For your situation, if you are launching hard at 4k RPMs it's possible you're just going to have some spin without dropping tire pressure or running stickier tires. If you go to the strip you might test what launch method gets you the best time, or play with a few other variables. Aggressive launches will spin, bottom line, but sometimes that is the fastest launch.
Where I'm more excited is for the car during spirited driving or track days. If you've ever come in or out of a corner too hot and got understeer on throttle, this tune should move more of the power off the front wheels for grip and transfer it to the rear for more oversteer, like a 50:50 split car.
A bone stock R, this isn't an issue. The torque split is tuned to be even, but if torque sent to the rear is software limited to factory output, then any tuned car will get the factory feel back but with increased power. Sounds good in theory, right?
You going to Great Lakes or elsewhere? I would love to go this weekend but I'm still patiently waiting for my drag brakes. 
