Serious decline in traffic to your affiliate sites?

On February 24, did you apprehension a austere abatement in cartage to your associate sites? Then you're not alone, awash Google new algorithm amend aims to advance the account of seek after-effects to abate the amount of "content farms" or "low quality" sites.
However adverse change accept had an appulse on abounding sites (including affiliates) beyond the globe. I've alone apparent some of my sites "Google us" landing cartage b ~ 40% but added in others.

What we apperceive about this change?

Many initially apperceive abstract application bound abstracts that we saw, Matt Cutts & Vanessa Fox to accord out some details, but a arbitrary of the best Google is searching for superior in this arbitrary SMX.

There are a number of things that continue don't add me with this update:

1. why didn't hit many really major content farms? Or is a prime example here.

2. If you have treated "low quality content on your site Google PageRank your low quality. One thought Google would be able to assess the quality-by-page basis.

3. I have seen a number of shopping sites such as thivind hit bad, but others such as Bizrate remain unaffected.