Contrary to this, I went into Aberdeen Audi as a 26 year old in my scruffy jeans and a t-shirt and not long afterwards had a test drive of both an A4 and A5 organised. Top of the line, not poverty spec, with no issues and no feeling of 'can he actually afford this?'.
I dealt with Adam Sinclair and although he wasn't all that great at offering deals, he does actually have an Audi himself (an R8 V8 spyder that is not owned by Audi as he's got his private plate on it and is actually looking to sell it) and is really easy to deal with. Never once asked my budget because I made it clear I knew what I wanted. Once done he worked through various finance options and such like and was very patient with me asking questions and having additional test drives and changing my order every other week.
I was concerned about my snowboard stuff not fitting in the car and he actually went and measured an A4 that was sat in the showroom for me while I was on the phone to him. That's good service in my eyes.
In the past when I had my A3 I never had a single issue with them and they even did the trick of looking up my numberplate as I pulled in and greeted me by name a couple times.