Planet13 - 8:23 am on May 8, 2011 (gmt 0)

Just to build off of FranticFish's comments immediately above, I have been looking at a few very narrow verticals and the sites that are ranking in the top ten are the exact things that FF listed - actually, even less diverse. I didn't see any blogroll links.

However, the keywords I look at get less than 30,000 searches per month, so they are very low volume key words, and there is no telling if the algorithm for keywords getting millions of searches a month is different than the algorithm for keywords only getting 30 thousand searches a month.