HuskyPup - 4:00 pm on Feb 18, 2013 (gmt 0)
This is my "Too Good" theory.
I feel this has probably been around for much longer than we may believe. I have had a specialist 60 page example.asia site for 6 years and it really is a comprehensive site for those specific niche widgets.
It's always ranked so-so however this last update every page has gone to both #1 in the regular SERPs and the image SERPs as though something else had just qualified the site as being the best for those widgets after 6 years!
I'm also seeing something similar on a 600+ page example.eu however that site is only about 18 months old with most of the additions in the past 12 months. Those pages are also all unique and comprehensive and are, at long last, dislodging crappy one pagers with one dodgy image, a couple of keywords and nothing else!