We just experienced this first-hand. We were staying at the GCH, and the first day there, they told us that the guests were getting upset because the people entering the front gate were getting into the WoC fast-pass line before those at the hotel guest gate. They actually suggested that we go to through the front gate if we really wanted to see the show. Luckily, by two days later when we went to DCA, they had started letting the hotel guests in about 9:20 or so, so they got priority over the front gate folks.
We went through the hotel gate about 9:50 and still had no problems getting FPs for the first WoC show. We ended up waiting about 30-40 minutes in the FP line.
One note on WoC, GET IN THE FRONT OF WHATEVER SECTION YOU GET!!! The FPs will list a specific cloor section you are sitting in, but you get to pick how close you sit. There was close (you WILL get wet), medium (you MAY get wet/misted), and far (you will stay dry). We didn’t realize this, and stayed towards the back of our little section because everyone was sitting and we would be out of the way with our stroller. But an hour before the show, the CMs made everyone stand up (to get more people into each section), and it ended up that my wife & kids couldn’t see anything of the show. It was an EXTREME DISAPPOINTMENT, especially after waiting all day for the show.