Hmm This will be really really handy for me.

Nice find.

This sounds very similar in concept (weighting measures) to the sorting option they launched 4 months ago.

"It's not just a plain sort by date, but rather we try to rank recent papers the way researchers do, by looking at the prominence of the author's and journal's previous papers, how many citations it already has, when it was written, and so on."
http://googleblog.blogspot.com/2006/04/keeping-up-with-recent-research.html

Also, if an article has more than 1000 citations, a researcher might want to view all of them. However, caps the limit at approx 1000. This has been an issue since the beginning.
  

> "ranked primarily by how similar these articles are to the original result, but also takes into account the relevance ... "

What's the difference between similarity and relevance?

Relevance = Search Terms ?

Similarity = Category or cited papers ?

oh cool! I hadn't noticed this!