Sometimes it's just the person you get at the time you walk in there I guess.
I get R34 bits from Lennock Nissan sometimes (usually just filters) and the guy I normally go in and see is really great, get me what I need (eg. got me a couple of breather hoses from Nissan Japan fairly quickly) and has a chat etc. Even asked to see my car once and brought the workshop guys out too.
But once or twice I get this guy who's mood changes completely when I ask him for R34 bits, he suddenly looks down on you and either tells you "we don't have parts for private imports" and walks off, or goes in the back and has a look for literally no more than 4 seconds, sticks his head out around the corner and says "No you'll have to try one of those aftermarket workshops" and then walks off.
Anyway, I guess it can depend on who you get on the day.