I did actually speak to the guys at RMS some time ago about this.
The shop itself hasn't changed for 25 years, and more to the point, the stock in the shop hasn't either. It used to be owned by friends of my father, and it WAS the place to go back in 1979.
Times change, and so should hobby shops. The owners of RMS now are quite proud that they're just a redirect company for the major suppliers, and taking the cream off the top.
Where I go, I get what I want and prompt and polite service is always there.
Even if I do call them wankers on a regular basis