Iowa's offense was about as abysmal as Nebraska's a year ago. Stanzi is an asset for one quarter and a liability for three. I agree that Iowa should be ranked ahead of Nebraska to start the year, but the two teams will be pretty equal in 2010.
The difference between Iowa and Nebraska offensively was the fact that Iowa had only TWO starters start every game on offense last year due to injury. Iowa's offense never got to practice together, and thus never really hit their stride. That is why Iowa's offense was so inconsistent last season....it could look really good one week and really bad the next. Nebbie had relatively good luck with regard to injuries, but still managed to have a very poor offense.
In terms of returning offensive talent...well, it really isn't even close IMO. Stanzi is a better QB than Lee (and who isn't?), Iowa has 3 WR's who would start over the best NU WR, and I'll take Iowa's top 3 RB's over Nebbie's top 3 RB's every day. The only place where Nebbie may have a little more stability is the OL...but we'll have to see how Iowa's OL develops before we can say that definitively.
Further, I have absolutely no doubt Iowa will have a more complete defense than NU.
The reason NU gets the nod over Iowa in the polls is name brand....the old guys in the polls have a sentimental place in their heart for seeing NU in the top 10, so they put them up there.