No, I knew. 8% more game time. Look, I hope you are right, but IMO you are out on a limb here. Your analysis ignores other ball carriers. 22% of 2014 rushing yards came from people other than the top four rushers. If the top 5 in '15 rack up 2400 yards, there are going to be carries attributable to others. How do they factor in? Or do we just assume Shay Fields, D. Lee, Sefo, Gehrke, Frazier, Spruce and Bobo will never rush the ball. Or do we further assume they will (which means more than just the additional 9 carries per game). If they are anywhere near the 20% production they represented in '14, now you are making the case the team will rush for over 2600 yards, behind an OL that, ahem, was not exactly parting the Red Sea, minus two starters to boot.
Every ballcarrier you list equals or exceeds 5.0 ypc, except Adkins at 4.66 ypc, in your prediction, when only one player met or exceeded 5.0 ypc (Pow at 5.27 ypc) last year. 2600 yards would have made CU the #38 rushing team for the year last year. They were #85. Totally reasonable to assume they will jump 50 spots and average more ypc than 80 other DI teams did last year. But hey, its the off season. Believe what you want.