Dealers behavior really does impact the buying decision. I'm currently looking and so far, Peugeots can go away- terrible dealers. Same as ford.
Renault, very accommodating - even let me put a filthy baby seat in a car for test drive ( with filthy baby) and they were not worried, even offered for us to keep car for a few days. My local bogan Holden (Vauxhall) dealer offered the same... And this is on sub $30,000 hatchbacks!
Also a Porsche dealer was great, they have a pug 308 GTi 270 for a very good price, ex demo car... Long story but they were super helpful and friendly.
Dealers need to understand that their role is essentially PR and customers still matter