they have us at 25th after the poor season last year? maybe they think Nebraska has turned a corner and is on an upswing?
These are purely analytical, so not really based on anyone's opinions (other than the weight given to metrics). They're not nearly as good as SBNation's S&P+ rankings IMO, but hey, it's the offseason.
Do you have a link to those? Not familiar with them. Why do you prefer them?
I prefer them because they're more accurate, and less "hand wavey" than ESPN's FPI.
http://www.footballoutsiders.com/stats/ncaa
Also, Bill Connelly (who created them) is simply a huge CFB dork, and I admire his work. I'm halfway through
his first book, and helped kickstart his second.
They do all kinds of analytical studies on CFB at his main SBNation site:
http://www.footballstudyhall.com/.
Also, his podcast is pretty good, they've been discussing a "moneyball" approach to CFB lately in regards to non Power 5 teams which has been quite interesting.