My site consider midsize to large with pre-panda traffic of 60k unique/day. Am sure that most of us feel the frustration. My site now hangs on life support of 18k/day and declining weekly.
But here is one reason why Google make a brilliant move that I give them a A++.
1. After months of searching and fixing my site. Boom! All of a sudden I figure out that is what Google want all webmaster do and be serious about your site and make it as perfect as possible so that the internet will have more and more great content.
Smart move Google. If Bing and Yahoo still sit around and not force webmaster to put some work on this site then they will lose the search war.