For the Dems, these numbers seem to be pretty reasonable. Sadly, those ridiculous CNN polls may really make the expectation's game difficult for Sanders to win.
After a certain percentage (around 15% or so) a landslide is a landslide and any drivel about expectations games goes out the window.
I mean, according to some people, Hillary's 0.4-point delegate win in Iowa (which was almost certainly a Sanders victory in terms of the number of bodies that turned out to caucus) was a MASSIVE mandate that totally changed the expectations game, so I guess the narrative is fair game!