Gosh, I never heard about the left twist thing, but I did know that the way a thread is wound tells you if it should be fed standing up on a pin or lying down for machines that have the 2 choices. My old machines didn't, my new ones do.
Haven't been having problems so I guess I am doing it right.
So happy for you on your new machine. I hope you and she have a long and happy relationship. Any pics? And did you name her? :-)