[dragonwriter]

There's a difference between 60% being the normal federal share, and a variable amount that, averaged across all states, averages to about 60%, being the normal federal share, particularly when addressing particular states policies, since the share for any particular state tends to be pretty consistent over time (e.g., the California regular FMAP has been the minimum, 50%, because of the states better-than-average economic health for long enough that I frequently have to remind who work on systems where it matters that that's not a fixed amount) and maybe be significantly different than the average.