If Einstein were a grocery store check out clerk, would he be an extra special check out clerk?

He would totally check out.

He is not a clerk. He could barely tie his shoes.  He had a wife to do the mundane.  He was busy in his own head thinking.  Not checking anything.  I think it was said that he had trouble with high school math.  I can see why.

Probably not, he would most likely get scolded a lot for 'sitting and dreaming' when he should be attending to the customers.

 Einstein was turned away from kindergarten because they thought he was retarded. 

probably