Goes to show you that even high-seeded teams (like BOS, TOR) could hit a snag when they go on the road for Games 3 and 4 facing their foes who feel desperation and re-gain momentum in front of their home crowd.
I'd say home advantage is incredibly vital in basketball than all the other sports to be honest (not to say it's not important in MLS, MLB, NHL, NFL, but basketball is FILLED with runs and momentum shifts all throughout a single game).