Hello mate, mine was lowered by 20mm by Audi when purchased on Audis sport suspension
I have now replaced those springs with Eibach Sportline springs and is now sitting about 35-40mm lower than your standard ride height, on a flat road i find the car sits pretty much even all round, if anything i would say the rear is slightly higher than the front by about 10mm max.
the handling has been improved by a great deal, and in comparison i have not comprimised the comfort, as suprisingly it feels better than it did when i had the Audi sport springs on!