I have had 2 SFEMGs at this point. My current yucky neuro did one. She did it on my strongest fore arm cause that was convenient for her chair

. She knew right away. Rather than trying a differnt location she kept trying the same spot torturing me for at least 60-90mn. The one at Mayo were ready quickly too. I dont know why a delay for you unless there is something puzzling in result.
I thougth the face droop thing was common. I sure have it. It was one of the things my youngest daughter complained about early in that she would say now you have to SMILE for the kids now mom. That surprised me as I thought I was. But I began to 'try' harder, work harder to smile. It takes more work to get a smile out of my face. The bad thing is that it can come across as always sad or mad and you arent really. This is great for the docs that want to peg you as mental case not MG.
Could you call and ask for results or request the written report. I do request.
Annie59