Yes it stops at the bus stops. Think this is also where the shuttles and mears drop off. We saw lots of taxis here so is probably their drop off place too. You go out of Citywalk past the movie theatre, along a moving walkway and then down some steps to the right. The bus stop is right a the bottom of the stairway. Probably takes five mins or less from Citywalk. We did this three or four times in Sept. The buses seemed to be pretty regular, we never waited more than fifteen minutes or so. I think it is the 37 but you can check the lynx site which has timetables etc.
http://www.golynx.com
We dont drive and found the lynx buses and the I-Drive to be great value for money. We stayed on I-Drive south and used them most days when we didnt go to Disney.