Wow, we had a completely different experience than most others here. We were in the parks the 4th thru the 9th and didn't have any problems with crowds or cheerleaders. We stayed at POP Century and didn't have any issues there either. We used TGM and went to his recommended park each of the first four days. We took advantage of Fast Passes and I don't think we waited more than 10-15 minutes for anything. One morning, at the MK, we did all of Fantasyland (and the Indy Speedway twice) within an hour. The last two days were a bit more crowded, but we used them to catch the attractions that we had missed the first time around. That was Friday and Saturday, so the crowds were bigger, but we had a lot less on our agenda, so it was still very enjoyable.
On a side note, because we were able to get so much done during the mornings, we headed out to the coast (both Thursday and Saturday nights). We watched the space shuttle launch from Titusville (about 10 miles from the launch pad). It was amazing!!! It's hard to explain to a 6 year-old that this is probably a once in a lifetime opportunity, but he thought it was cool and hasn't stopped talking about it.