We just stayed at OKW for my birthday and we used the Disney buses every day but one. We were in the Old Turtle Pond area, right across from the bus stop and that was very convenient. The buses were hardly ever crowded. Old Turtle Pond was the 3rd stop, so we had 2 stops after we boarded before heading to the parks, and we had 2 stops before ours when we returned. I have to say that the layout of the resort is not conducive to running the buses through it. So many turns and a lot of back-tracking. The main stop at Hospitality House is the last stop before going to the parks, so if the bus is crowded, you will be standing if you are using that stop. When there were a lot of buses in transit, it seemed like it took a long time to get out of the resort and on the way to the parks in the mornings.
We've stayed at CSR multiple times and I've always thought we had the best overall bus service there. I appreciate that the stops are all around the perimeter of the resort and it seems very efficient to get through them all and on the way to the parks.
Now, I will say that we had a lovely stay at OKW and I would stay there again without hesitation. The bus situation was not a deal-breaker for us and we didn't mind the longer route. It just seemed less efficient than other resorts where we've stayed. As I told my husband while on the bus one day, "I bet the bus drivers hate this route" - it just seems like a difficult route.