I have not been watching my site listings very well since Christmas. Just looked at freshdates besides some of my pages and noted a six day discrepance between retrieval date and fresh date shown. Then looked at one and retrieval date and fresh date both showed the 16th of this month. What I had usually observed in past was a two day difference.
They are using crawl caching proxy servers now. But I think it is causing problems - or at least compounding them: http://forums.digitalpoint.com/showpost.php?p=909378&postcount=100