While the AP blockout will for sure have an effect on crowds, it just doesn't compare to the madhouse of christmas break. Even if it's crowded (which it probably will be), it won't be 3-hour-wait, impossible-to-move crowded. And on any day of the year, you can get plenty done within the first few hours the park is open, as long as you plan accordingly. In fact, sometimes it is better to go in high-season, when the hours are long, the entertainment is at it's max, and when there are minimal refurbs, than in low-season. I guess that crowded is really based on perception and expectations, and everyone has different meanings of the word. But my point is, that the last week of may is considered high-season, but when you compare it to the rest of high-season, there are times far more busy.