Same as everyone else- April 28th, I statred feeling the pain. Deep site 1MM+ pages... always got a lot of long tail search. Down 1/3 in total traffic, almost 1/2 from Google gone. Mine is an info only site... an "expert" site if you will. VERY Broad in coverage. My referals are still holding pretty steady, and so are my natrural links.
I have noticed a few days where Analytics have been way off for the previous day. Friday, I think, showed my traffic was down 1/2 from ythe previous day (which was 25% off normal). The next day, data was corrected, and it showed just the 25% off.
Sunday is showing a big down in Analytics... my logs do NOT show it. But I do not show a rise, either.
I have been rolling out a new section of my site in the middle of all this... I am wondering if I picked a REALLY poor time to do this. I put up an XML sitemap of about 400K new pages... Google shows 1 indexed. ONE! ANd it has been up 4-5 days now. I see them crawling the new pages.... but not adding anything. Crawl rates doubled, number of pages crawls shows a srong, steady ibcrease since min-March. So poor timing on my part... or do you think this will all appear in the SERPS when this is all... uh, over?
Also, since we are all losng traffic (and lots of it), who is getting it? I see no posts regarding that, or "I have LOTS of new visitors" posts.... Is it all going to that web-suck called Wikipedia?