Just got back after two weeks and the first week FP availability was pretty good, even same day - and SB waits were nice and low for many attractions. I think even Touring Plans revised their crowd level estimates downward for that week.
The second week, though, was the exact opposite. FP's were gone very quickly and by late morning/early afternoon selections were poor. I felt sorry for the people standing in long lines at the kiosks knowing that when they go their turn they were only going to find attractions that they probably could have spent less time the SB line than to stand in line getting an FP for it.
Between a couple of weeks in Nov/Dec and a couple of weeks this month, I'm seeing a pattern - when crowds are low and SB lines are short, FP selection is pretty good even same day. When crowds are higher (7+) and SB lines are longer the FP selection is pretty poor very quickly - and a lot of the headliners are gone a day or two before.
Definitely takes more planning than it used to.
As to the comment about long kiosk lines, I took this picture Thursday (3/19) at MK:
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