Are the Cletics a championship team?

Maybe its the fact that the Celtic's have not won an away game so far in the N.B.A playoffs is what leads me to feel that the Celtic's cannot go all the way.
Even though they have the big three and a bunch of talented players they seem to be able to win road games.I think the Cavs could have eliminated the Celtics
Lebron was just to well contained.So my question to you bloggers is if the Celtic's went to game seven with a one man team, what can they do with a pistons starting five and the best bench in the league nicked named
"The zoo crew"