Really????? Well it appears to according to some observations from the Webmasterworld forum. In a strange move (imo) from Google it appears that have extended part of the functionality of SearchWiki into the paid search ads (ie that part being the ability to remove results from the results page – denoted by the x). Given that these results are not algorithmically generated (or at least to the extent of the organic results), and the fact that advertisers are paying to display these ads, it is a brave/strange (take your pick) move by Google.
This doesnt appear to have propogated into the mainstream (yet – certainly in the UK I am not seeing this) – and would appear to be limited in terms of testing, however both Rehan and Rustybrick raise an interesting question in terms of how such functionality would impact on Quality Score – which I would suggest would be one of the motivational factors from Google behind deploying this in the paid search ads. However whilst this would in all likelihood only reduce potential coverage only slightly (given the amount of manipulation browsers actually apply to their search results), it has a potential to impact on advertiser impact and as such I would suggest that this would probably have a more vocal response if rolled out fully.
I would be therefore very interested to see how well such functionality would go down with the agencies, given the luke warm response to the original SearchWiki rollout.