Finally Google accepts the problem and gets it going for what it takes to improve search. This and the Personal search result blocker extension released last fortnight are part of the right steps in the direction.
We can’t make a major improvement without affecting rankings for many sites. It has to be that some sites will go up and some will go down. Google depends on the high-quality content created by wonderful websites around the world, and we do have a responsibility to encourage a healthy web ecosystem. Therefore, it is important for high-quality sites to be rewarded, and that’s exactly what this change does.