onepointone - 7:20 am on Apr 24, 2011 (gmt 0)
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.
Most people SEO for google. Those "improved" sites will still be indexed and ranked by Bing/Yahoo. They probably won't be lowered in SERP's for improving.
So in that sense, google did their work for them.