At the end of the call she said she would do anyone. It probably has more do with the "yeah, what's up girl?" that he started the conversation with. That's not how you start a "business transaction." It would have been better if he just did it like a regular black guy and see if she did the same. But smh at being willing to pop someone's back pimples
It tainted the entire experiment to have the "Black man" call unprofessionally and have the White man call like, "Yeah, hey, How ya doing?", it set different ones. If you conduct an experiment, you have to isolate the factors you want considered and freeze the others.
When this type of scenario is used to identify racism/prejudice in the job market they give the candidates the same resumes, and have them dress similarly. If you sent one in dressed down or with different education/credentials, you would not be able to determine if race was actually the issue or their other differences.