I'm noticing a massive trend of key sites removing filter navigation from their SEO landing pages as part of a clean up and simplifycation of their SEO landing pages.
The tendency is to direct the user to an in depth search page, and/or using HTML navigation links to allow users to drill down.
In replacement, sites are simplifying their screens, removing a lot of content, adding back more space , putting up large photos.
Matt Cutts mentions navigation very briefly here as a potential consideration in his video about Google evaluation raters : [youtube.com
What are SEO's and site owner's preferring, and why? Is it producing desired and measureable quality improvements?