Not in my experience.
I speak clearly and I use correct grammar. While I am a Southerner, I have a very slight accent. I do not say, "ya'll" or drop my 'G's. I never say things like "honey child" or "ain't".
At any rate, I was forced by a sudden illness to go to an emergency room at a very nice hospital in Jacksonville, Fl.
The attending physician, a woman from INDIA, who could barely speak English, was slighly rude to me. She was not friendly and never once made eye contact with me.
She then handed me a prescription and further instructions for my care, and asked me very rudely,
"DO YOU KNOW HOW TO READ?".
I told her that my family had been reading and writing English, BEFORE her ancestors ever knew there was such a place as England!
She just stared at me... finally making eye contact. She just continued to explain, in her very poor English, the treatment plan... which I had great difficulty understanding.
Just give me an American Doc... I don't trust INDIANS at all.