Op, posting that you own a premium vehicle whilst being outraged by tyre costs was asking for criticism.
I'm not sure if the op was intended to provoke a stream of sympathy but from your proclamations that the forum is full of 'little men' as you put it, I kind of get the impression that you were sort of expecting this?
I get your pub chat comment and yes, if you went to the pub to discuss tyre prices then I'm sure you would get a bit of sympathy
But telling a bunch of car enthusiasts that branded/oem standard tyres for a premium German car are too expensive is going to result in the responses you got every time.
If you got a great deal on the car as you pointed out, then take solice in the fact that your saving on the purchase price of the car offsets the cost of new rubber for it.
It's a good lesson for any car buyer really, as weighing up the costs of consumables is an important aspect of car ownership often overlooked at purchase time when costs that are small in comparison (road tax for example) are accounted for as a higher priority.
Out of interest, what vehicle did you own previously?
Listen - Get off the Forum High Horse and read everything I said and the tone of it all.
"Just had kittens at cost of tyres!

Going to start saving now...."
Does that say "OMG I CANT BELIVE I NEED TO SPEND £400/CORNER ON A TYRE WHYYYYYYAAAAAA OH WHYYYYY, THATS SO UNFAIR AGHGHGGH"
No it dosent.
It is a friendly "just had a look at tyre costs and they were more than I was expecting, best start saving oh can anyone advise on PSI"
Think I have clearly said a few times now that I wasn't expecting them to be cheap and hadn't checked as I knew the ball park they would be roughly in and it wouldn't have stopped me buying the car.
I wasn't looking for sympathy or for someone to agree with me - I was simply stating that I don't think some of the responses I got were very fair or worthwhile and dare I say it - Relevant given what I was saying/asking and the tone I said it in - People just wanted to share their opinion about a situation/approach that I wasn't involved in and didn't take - What has being a car enthusiast got to do with good manners and decent conversation? Was I Saying X car is better than Y Car with X car clearly being rubbish? Was I trying to tell a car enthusiast they are wrong about something I clearly have no clue/valid experience of?
When picking the car I looked to get the best deal I could (which I think I did) - I bought a diesel due to the miles I do etc - But I didnt sit down and analysis oil prices in past 10 years and next 3/4 years when I will have the car.
Just like I knew tyres may be a little more expensive due to increase in rim size etc...but now having looked into them I think you pay an added premium for them.
But they are what they are and shouldn't have to worry about it for next 20,000 miles if I behave myself - Did just dawn on me that I may need to replace all 4 since its Quattro, is that the case or one of these Urban myths?
Come off it, just because someone has a flash car doesn't mean they loose their entitlement to cry about the cost of tyres. If they couldn't afford the cost of tyres then that'd be a different thing all together and would need a lesson in "look before you leap".
What I was trying to saying but put far more concisely!
Part of the problem with buying nice cars on the second hand market is that previous owners purchase the cars without realising the costs involved in running them and then don't look after them. This might explain the negative reaction because it causes issues buying nicer second hand cars for forum users and enthusiasts.
Think you are giving people too much credit