No, not all courtyard views are lobby views. There aren't all that many lobby view rooms and some are standard. I had heard about some people being bothered by noise but really the only thing we ever heard were some occassional noises from the restaurant, but never really late.
If you do reserve a courtyard and you're not asking for a lobby view, be sure to ask for a main courtyard view. They consider the rooms that overlook the WVL pool to be a courtyard view too.
If you reserve a courtyard view and request overlooking the lobby, you're guaranteed a view of the main pool area if your request is met.
Our room was 5071 and as I said, it's a distance from the pool itself, but it's a wonderful straight shot view of everything!