For Pigeon, there have been some impacts on local businesses--especially where there were the "7 pack" of local search results showing up and now they're not. Certain keywords were "hit", and don't show the 7 pack anymore.
It also looks like some of the "local" map boundaries have been changed for certain keywords. For example in Dallas, many of the Dallas kewyords were only showing local sites literally in the city of Dallas. But now the suburbs are included, so the sites have more competition now.
Pengiun really hasn't been updated since last October, nearly 11.5 months ago. So we're still waiting on an update. If your site was hit but Penguin, then you need to wait until there is another update. You should be cleaning up your low quality links to your site, though.
SEO since 1996, I've been doing internet marketing. I have the experience as an SEO expert
, as well.