Polo, I pretty much agree with you, although even if we are a ways removed from our championships in football, the fanbase is still affected by them and in turn affects Bo with the expectation of them, so while the situations were similar I don't think they were near equal.
Miles has done a tremendous job, producing on-the-court results, but also marketing himself. I consider that a bonus, not a necessity, although in today's world it's becoming more and more necessary. Either way, Miles is pretty much playing with house money and so far he's getting us a good return when we didn't expect anything so we're happy, whereas Bo is (at this point anyways) being chased by the ghosts of those who came before him.
The double standard in expectations is understandable, but there's actually a double double standard or something when we turn around and compare the two when they shouldn't be comparable.
I posted a status about a month ago asking people when Bo Pelini has ever overachieved. The fact that nobody thought to mention the 2008 season is pretty indicative, to me, that though we aren't performing at the level we are capable of, even if we were, the expectations are unfair and that still wouldn't be good enough.