It's not fickle. It's completely understandable and McMurtry has earned plenty of fans on her own right through the last couple of seasons (especially on vault). The point is the thought of Skinner as AA champ turned more neutral fans towards rooting for McMurtry in a six hour period than otherwise would have ever happened. If Nichols hadn't fallen on beam, the desperate pleas for McMurtry to hit wouldn't have happened either.