Two things, we got swept by the Cavs but were hardly demolished.
Funny thing, look at the great Houston team and how they're being destroyed by the Clippers. You know, a team with some stars and MVP candidates on their team. And they are losing to a Clippers team that was decimated by injuries, playing without Paul in their first 2 games.
Look at how much trouble Chicago is having with Cleveland, a team that lost it's 2nd/3rd best player... which doesn't mean much other than he's only placed like that because they do feature LeBron James.
That the Celtics lost against the best team in the East, at full strength, is not proof of anything.
As for the Hawks, they were a team that had a poor 2nd half to the year... similar to the Pacers last year. Well not poor, but certainly not with the strength that the team was lauded for earlier on. Plus Millsap got hurt entering the playoffs, and he's sick today and out of the starting line-up.