I don't find it surprising that some will have ISU out. Let's face it. This team can finish the regular season anywhere from 1-5 to 6-0 and a valid argument could be made for each and every record. The only "sure" win is likely Texas Tech at home and they just played pretty well against WVU on the road.
When a team wins a close game at home against an opponent, it is more likely than not that they will lose to that team on the road in the same season. Now, ISU beat Oklahoma soundly in Ames, beat Baylor pretty well, but just got by WVU on a last second shot. Baylor is 5-1 at home in conference, the only loss being to OU by 3. They beat Okie State at home. With the way ISU has played on the road, I think it could be argued that their best chance for a win will be at Oklahoma. Of course, OU is also 5-1 at home in conference having beaten both KU and Okie State at home, and losing only to K-State by 2.
At home, ISU has Tech, plus games against 2 of the top 3 teams in conference. The home and home rule favors ISU in those games, since ISU lost close games to those teams on the road. Also, ISU likely will still have the home streak going for it when KU comes to town. A negative factor for ISU is that both Okie State and KU are probably going to still be in the hunt for the conference championship when they play ISU.
So, some of the "experts" no doubt are going to see ISU finishing 1-5 or 2-4. I think it is as easy, maybe even easier to make a case for that than it is to make a case for something better.