I am not one to assume others’ points of view, reasoning, thoughts, etc.. Humans are like sand on the beach – every one unique and different, and no two grains have the exact same view of the ocean.
That being said, Germans are typically very “business-like” minded about a great deal of things Americans believe is better with a little bit of passion or emotion thrown in (which is neither good or bad for either side). Based on my experience with Germans as a hole, she probably considered me a business transaction – as if I were paying for a carton of eggs – and thought of me just as long as a grocery store cashier would.