Parisians can be quite rude to English speakers; don't take it too hard. As they say - France is for French.
My wife, son and I spent a week in Paris about 6 years ago (the year Floyd Landis temporarily won the Tour d'France). We were a little apprehensive given that oft-repeated warning. We found it to be "urban legend". My wife encountered one rude salesclerk at a small dress shop. Otherwise, all of the Frenchmen and women we interacted with were not at all condescending or impatient w our English or our somewhat crude attempts at French. One night I got almost completely thru ordering my dinner in French and finished w "por favor". My family near split a gut laughing, but the waiter didn't even blink. We are all very anxious to go back. Paris is a little more difficult than London for Americans but its well worth the effort. Just be aware that it can be VERY HOT in mid-summer and A/C is not nearly universal, but I'd go back in heartbeat.