A Tweet's Effect on SEO Rankings - An Unexpected Case Study
seomoz.org
seomoz.org
Given how unspecific the search term is, I can only assume that's because 94.58% of that traffic wasn't actually organic traffic, but was SEOmoz staff + people they talked to clicking on it.
Whereas a tweetstorm from "real" people is probably indicative of actual (if temporary) interest, hence legitimate pagerank.
What's happening, I think, is that different social sources are providing Google Juice with different decay rates. Which sources have which rates? Your guess is as good as anybody else's. Ugh.
I wonder how complicated the entire business of figuring out how to tell people about your startup or your web article is going to get? The trajectory isn't looking too good.
Example: there currently exists a bishop who will be the next pope. His web profile today is substantially smaller than BCC's, and is likely dominated by 200 word wiki articles, a page at his diocese, and perhaps some Time Magaxine profile from when there was speculation as to who would follow JP2.
His Holiness will eventually pass away, which is going to ignite an immediate Worldwide News Event that will cause query volumes for the top ten candidates to skyrocket. Google wants to return fresh results for those (e.g. not the pages currently ranking). Using Twitter to trigger QDF gets that hours before the link graph will reflect the new speculation articles' popularity, without requiring manual intervention.
This is, of douse, just one signal. Google News feeds, the query spikes, and sudden radical increased appearance of branded terms on trusted pages all point to the conclusion.
Of course, it's not an either-or situation. Both could be true.