I wonder if they 'dropped' their discovery date or something and had to 'go with the first crawled after'
I don't believe so, for my widgets I am seeing a lot of forum board postings from 4/5/6 years ago ranking #1 with nonsensical answers or non-updated in years, dormant portal sites with simply one image and one keyword ruling now, period.
Believe this or not I have the only portal site in my industry regularly updated and I have lost 50% of traffic etc, the former #2 has completely disappeared, cr@p is now everywhere and considering that my specialised construction produts data has extremely important information, woe betide Google if something falls on someone's head owing to false or out-of-date information.
I personally have trademarked plus keyword domain name sites not ranking in G yet all the other SEs have them at #1, well, except Blekko:-)
Panda 2.1 with Google cached pages from 4/5th May seem to be my worst affected.
I have never used Bing and DDG as much as this last week, G may say their search volume is the same, why, because it's very difficult in some widget sectors to find anything therefore more pages are being searched, ergo no change in volume or maybe even an increase.
I don't play silly games and this is just downright stupid.