Farbet the sales lady may or may not have been a Realtor. Remember all sales agents have a license to sell real estate in CA but not all sales agents are Realtors. I have never worked for a developer however I do not believe the sales agents earn the same commission as any other sales agent who works with resale properties. IMO working for a developer would be pretty sweet, the buyers all come to you, you negotiate based on what the developer gives you leeway to negotiate to… all in all it does not seem difficult. The hard part is the cattle call, when the sales office is packed with people and you are the only agent in there.
Sounds like this sales agent may have acted in a discriminatory manner.