I have tested these guys..and I like what I see. I think their team metrics are the best in the business. They have the Fins as the 4th best team: http://www.gridironrank.com/2013-dolphins.html
Ugh, just to soon to really see what we have from a stats pov. 4 games in, much better idea of trends and who is rising and playing well.
Thanks. I love when someone points me to a new website. If I have time this week, I will look deeper into these stats wit the intention of matching them against point spreads on a basic level to try to determine correlation there on the surface level, disregarding Home/Away, Injuries, Turf/Grass, etc to see what I come up with - on a merely evaluation basis for week 3.
I wasn't able to get to the page that explains their methodology. The link just kept sending back to their home page? I do tend to focus on efficiency as they claim they do, but I don't know what stats they look at to define efficiency.
Just from a cursory look, seems to be similar to EPA or DVOA. Not sure I would say they're superior to others out there, but good stuff nonetheless. EDIT: actually seems almost identical to EPA.
My impression was that it was similar to DVOA but based on a per drive expectation rather than on a per play expectation. My gut says that such a strategy may eliminate some of the "noise" and may end up being both more reflective of what happened and more predictive going forward.
I like this particular stat posted by Erik Frenz (Patriot beat writer on Bleacher Report) on twitter from PFF