alexsel - 4:28 pm on Oct 27, 2011 (gmt 0)
I've actually also seen something similar for a very competitive keyword (perhaps one of the most competitive tech-related keywords) but they are really a mix of natural, aged links and a ton of comment spam plus known and very obvious paid links. They were actually ranking page 2-4 before the original Panda and now they're ranking one page 1, positions 1-4 ever since the original Panda.
This site has bought hundreds of domains, all linking to each other, then linking back to original site with the high volume keyword in anchor text. Perfect example of running a link scheme and obvious example of manipulating the search engines. They've even tried to hide their content (keyword stuffing). All of this is so obvious and easily detected.
but I doubt they look at more than 0.01% of them.
That many? Golly, better than I would have believed... looking at the g serps these days! :)
Ha. I didn't say address, I just said that they look at them. Then disregard..