Still without any formal language training, almost everything we say starts with: Sprechen Sie Englisch? The response, without fail, is always: ein bisschen (a bit).
Except, ein bisschen really means: I am fluent and will hold this entire conversation with you in perfect English!
Honestly, it is pretty amazing. Perhaps Germans use this response so that we will forgive any imperfections in their English, but often there are few to be had. The level of English fluency in this country is better than in the States!