Indeed, a lot about the R35 has been learnt the hard way, and unfortunately those that have had issues and trying to resolve them in here have been faced with being beaten down by RB owners who have sought to relieve their own negative insecurities, rather than constructively supporting or assisting in resolution.
There is also a lot of DIY going on in the R35 community here. For more complicated work, some choose "stealerships" and others choose select garages that know what they're doing. The DIY lessons learnt information is very much available and shared freely amongst ourselves, but not in here which is a real shame for SAU (and well RB owners who like to bash) - but technically speaking the discussion that goes on is between R35 owners and select R35 specialists outside of SAU is a massive win win for R35 owners
I think where the US and AUS differs is not in the "class" of people, but in the fact the R35 is cheaper (allowing more modding & DIY after delivery) and more readily available at a reasonable price - and the RB community feel more at home beating down on their own kind rather than the R35 group. Also has to be said, the US GTR forums pretty much cover everything there is to DIY, so you wont find much replication of DIY threads on SAU - because the information already exists.