It certainly paid off for the Celtics, with the self-proclaimed "Shrek and Donkey" combination carrying Boston to the series-evening win.
Rick Carlisle took the other route when presented a similar option in Game 6 in San Antonio. Roddy Beaubois fueled the Mavs' comeback, giving them a shot to beat the Spurs and bring the series back to Dallas. But Roddy B rode the bench for most of the fourth quarter, with ice-cold Jason Terry getting the nod.
Carlisle's choice was based on history, not who had the hot hand. It's likely a decision he wished he could do over.