It was done as part of 30k service, which was covered under VW care.
They weren't going to do it until I explained that it was in fact part of the 30k miles service. I gave them specific instructions to clean the screen, replace the fluid and perform the required adaptions in the VW service manual.
For all I know, then drained it, filled it with piss and laughed.
My car has seen a HARD 30k miles. 50+ autocrosses and 5 track days. I didn't notice the VAQ degrading at all. And I have driven non VAQ cars on 200tw, so I know what it feels like to not have a functioning LSD or VAQ.