Planet13 - 2:35 pm on Jul 9, 2013 (gmt 0)
Getting back to the original question for a moment:
Has Google increased the importance of website size as a ranking factor?
I would say without a doubt yes.
I was looking at the results for a particular style of clothing (we'll call it "widget clothing") and the SERPs were flooded with large name clothing retailers who you would normally NOT associate at all with "widget clothing". They are companies that make or sell clothing that is about 180-degrees away from "widget clothing".
Yet they had all made one page on their large domain dedicated to "widget clothing" and that page was outranking independent designers who are dedicated to "widget clothing."
Another disturbing thing is seen the plethora of ebay sites where someone has created a username based on a keyword (we'll say, "bluewidgets" for the keyword "blue widgets" and that page is ranking, even though there text is stolen from other sites).
(Can you tell I am tired of filling DMCA requests against ebay and amazon user pages?)