NefMoto

When taking off swiftly, there is a small but noticeable delay from the time the accelerator is mashed to the floor, to the time the revs build up and the car takes off. It feels like around 0.2-0.3 seconds. Knowing that VW put a huge 0.8s delay in the DSG launch control for safety, is this shorter delay needed by the DSG or can it be removed?

Have you considered that there is a physical delay in how the engine behaves? That it's not a computer game?

You can start by providing logs. You've been on here long enough to do that.

Yes, I have considered that, but knowing that VW also put that 0.8s launch delay in there made me ask the question.

I will try logging soon, just haven't had the time.

For a start, I'm thinking of logging upwg1/2 ,wped_w, wdkba to see how quickly the throttle responds in neutral and in 1st gear when taking off. Also log timing in both cases to see if that gets altered.

If there is a signal from the TCU to the ECU to keep it idling when I press the accelerator, is it just migs_w or is there others to look at?

Logs first, theorycraft later.
Most likely what you are experiencing is physical.

Only thing that can do something is LSD, but I doubt it. Launch delay is a completely different thing.

Your post is just shit tbh - a vomiting of random ideas instead of using the scientific method.
You wrote a logger FFS, before even posting this vomit, you can do some super basic test to see the relationship between wped, zwout and wdkba.
Only after that can you start to see if there's even anything worth writing about.

If you were posting the first time I'd cut you some slack, but you've been around, so no quarter :P

Apologies regarding the vomit,
 I should be able to log something on the weekend. I temporarily disabled LSD and also did the left foot braking trick mentioned in the wiki.

I had a look at logs and it looks like most of the delay is actually the engine going from idle to clutch stall rpm. It takes around 0.2 to 0.3s. The throttle is behind the pedal by about 0.1s. The brakes ,B_brems, are not released until just after stall,so there is a moment where the rpm is flat - even though the pedal was released before pressing the accelerator -again ~0.1s.
Unfortunately the logger samples at 10Hz, so I can't be so sure about the 0.1s delays mentioned above, but overall 0.3 to 0.4s is lost before the car moves. I logged ngas_w when freely revving the motor and the idle to 1800 (~stall) is a rather sluggish area , perhaps deliberately to protect the transmission or just the nature of 4 valve heads?

I probably need to learn to use both feet so as to keep the revs at 1200 first and then let go of the brakes :D

Exactly as I said, it is purely physical.
Not sure why your logger goes 10hz, there's no reason not to run it faster.

Sell the car, buy a Tesla or Kia EV6 GT, and be happy if a N/A VR6 is too laggy for you.
All modern cars have even more lag.