Also, I’d suggest that “high-quality blogrolls” implies the linking blog’s PageRank, as well as how “vertical” that blogs subject matter is in relation to yours. For instance, if you toss me a link, it’s great because you write about online media and your copy will be littered with the appropriate keywords. But if a site about Britney Spears throws me a link, that might not be so hot for me. Also, if I get too many low-quality links (the result of spamming and link farming), it could potentially degrade my ranking.

Also, the existence of the blog in high-quality blogrolls is a difficult one to track, too. What’s meant by “high-quality blogrolls?” A-lister blogs? There’s a whole lot of controversy about that one–that’s been brewing and bubbling for many a year now. All sorts of stuff about “link whoring” and “gatekeeping”. if you’ve got the time to research it, it’s interesting stuff.

Also, google’s algorithms can squash you in a very short time and with no notice. It’s why many good web designers will tell you that they can’t guarantee SEO. One never knows when Google’s dice will roll against you.