I'm also worried but when looking at the list on touringplans, I notice that it's probably just a placeholder number. Why is late April 7s? As far as I know, there are no spring breaks in early to mid May. Colleges aren't over yet. There are still finals and graduations until around the 20s of the month. Schools aren't out yet. There's no reason for the numbers to be in the 8s and 9s. Parents are far more likely to take their kids out two months before school ends than 1 month especially when attached to a vacation time or a three day weekend like Memorial Day.
The only time that should be this high a number is Memorial Day weekend. That thursday, friday, sat., sun, and then mon and tues. after.
I just checked on disneyworld.com for all the resorts and they all have openings for the week I'm going (5/12-5/19) There have been times in the past when trying to plan a last minute trip and there's nothing available except for conceierge in Deluxe resorts. That's not the case now.
Someone either on wdwmagic or disboards have said that they've had no problems with ADRs and changing them for early to mid may. Doesn't sound like 8 or 9s to me.