I guess I was wrong about the Celtics. They just proved that even with an unexperienced team with a good young talents can potentialy win against a strong opponent. They just played very well, and I guess we'll gonna see different team in the finals.
They are a very different team from last year's ECF and so is the Cleveland Cavaliers. The Celtics have the advantage here over the Cavaliers because James and some of the new faces of the Cavs needed time to acquaint and jell to the system of coach Tyron Lue.
They have had enough time to get used to each other. A whole season for that and more for a lot of players. They even beat the top seeds in the Toronto Raptors. There are supposed to be no excuses at this point. It is the Conference finals.. not some exhibition game to not "gel" and all. LeBron has come out hard this game but theres only so much they can do by himself. The Celtics are just a better team altogether with players stepping up at the right time. Jayson Tatum and Jaylen Brown showing up big time and cant forget scary terry!

I was wrong about them too

I thought that Celtics can not do much without Kyrie. They are really great composed team. I have so much respect to Brad Stevens and his assistants. And my favorite player last night was Marcus Smart. What an energy that man has, giving so much to the team, especially in defense.
How much more if Irving was there? For sure we would really able to see a very competent performance.I didnt even expect for this team to bloom out and defeating cavs 2 times in a row.If this momentum would continue then we would definitely see another team in the finals which would oppose or break most peoples expectations. 3rd game would happen on Cavs homecourt they should really make some comeback if this would turns out to 3-0 then this is already a dangerous situations for Cav team.
I would say that it might be a blessing in disguise. Without Irving, Celtics team really works very hard entering the playoffs. And now when they face Lebron in the East finals, they poured everything at both ends of the court.
The key is how they rotate and not giving enough space for Lebron, although he made a lot of points in the second game, it's still not enough to get the W. I'm not surprised at Jayson Tatum, I already knew that he will be a good player in the future.
So we are back in the Cavaliers homecourt, I'm sure that the Cavs will win Game 3 and make it 2-1.
Well talking about Kyrie, if he played this series it would have been a different outcome. The game play would be different , because kyrie is their main man and he will be expected to control the ball as he is an offensive superstar and he's not the type of pass first point guard just like Rondo. Neverthless, it still good to see a game with both healthy teams, yet what we're witnessing today is a good competetive young Celtics.