The quality of the results is not even close to what it was a few years ago.
Ah yes, but then the 'quality' and certainly the quantity of the spammers has increased, possibly exponentially. Keeping quality at the same aproximate level is an acheivement in itself.
We've been whacked on a few major (mostly 'vanity'*) phrases, but left top 3 for a few more. Our strong mid- to long- tail is similarly affected. Our most historically rock-solid keyphrase sets are fine, whereas the more variable sets, or non-grouped phrases have been randomly distributed.
I missed all the fun as it rolled out. Just got back from a 2-week 100% offline holiday.
*'Vanity' here is high volume search, converting VERY poorly. Good for Brand Recognition, but not sales generation.