Got mine back from its MOT and service yesterday. I'd also had a full Audi alignment check while it was in and it was apparently found to be toeing to the left on both axles. Everything was then adjusted back to factory spec.
The difference is very noticeable. It no longer resists getting back the the left side after an overtake (phew), it's less fidgety and to my surprise the MPG has lept.
I guess the tyres must have been suffering too, so that's £125 well spent