It was a joke.....
I've never seen or heard of any for the A4 personally, but I've never really looked into so - can't say that for definite.
After completing the Plenum chamber clean today as per the recent thread, i took my battery out to clean the drain plugs. I can confirm that a strut brace is fitted as standard. Its not a tubular one like you would buy, its a steel bar about 8mm by 30mm, bolted to both suspension turrets and the bulkhead. Not decorative like an aftermarket one, but i am sure just as effective.
My 2.5 v6 tdi has a front one on, thought it was standard on this model.Its a pain because it covers the battery clamp, makes it a pain to remove the battery.