Last two seasons, Celtics vs. Magic
11/18/07 - Celtics 102 @ Magic 104
12/23/07 - Magic 91 @ Celtics 103
1/27/08 - Celtics 93 @ Magic 96 *No KG, Jameer Nelson
12/01/08 - Magic 88 @ Celtics 107 *No Jameer Nelson
1/22/09 - Celtics 90 @ Magic 80
3/08/09 - Magic 86 @ Celtics 79 *No Jameer Nelson, KG, Rondo
3/25/09 - Celtics 82 @ Magic 84 *No Jameer Nelson, KG's last, very limited game
So, technically, there isn't exactly a large sample size of games the past two seasons, where both of these teams have been "at full strength." Celtics went 2-1 in those 3 games, and the only loss was the first loss of the 2007-2008 season when Pierce missed that three at the buzzer.
Thorpe sounds as if it's not even close. He's completely wrong, and the Magic needed 7 games to beat a KG-less Celtics team.