Everyone fails to mention that Boston was also without Perkins. Now don't get me wrong, he's not an All Star player, but he is their starting Center. He's been a solid defensive contributor all year. Their second leading rebounder, and he blocks just as many shots as KG. Sure Big Baby stepped in and had a very nice game .. but that really speaks more about their depth. I thought it was rather appalling that Duncan and Oberto didn't or couldn't take advantage of Boston missing both of their starting bigs.
And I personally find KG to be a much bigger/valuable piece to the Celts than I see Parker being for the Spurs. Duncan is the equivalent to KG in terms of value towards their teams, not Parker.