that doesn't matter, in 2010 NBA finals, we were tied, and won game 5 to take the series lead, and then lost the last two...
Though a win is a win, and the format is different in the playoffs compare to the finals (2-3-2 vs 2-2-1-1-1). So winning game 5, coming back to Boston for game 6 is an advantage!
So, Go Celtics!