I think we can start discussing this question. My short answer is I think it is or at least it might be.
IMO here are the best pacers defensive teams - in no order
1994 - Brown's first season. You had a healthy McKey, AD, DD, Workman. All great defenders.
Byron Scott was also very underrated.
1995 - You did lose some when you replaced Workman with Mark Jackson. But Dale and Antonio were more experienced and confident, and McKey was just as good as the year before.
2004 - Best defensive player in the NBA - Artest. A great defensive tandem in Foster and JO. I think this is the best defensive frontline we have ever had. Sure 1995 was good too, but Smits really brought it down a few notches. But when the Davis boys and Mckey were in the game together that was better than 2004.
2012 - Stats wise this is the best of the 4. once Granger comes back and you have Paul George, George Hill and Danny, I will argue that is by far the best perimeter group of defenders we have ever had as a group. West is very solid and experienced. Hibbert's only weakness is on pick and rolls and when he has to come away from the lane area. Roy is our best combination of shotblocker and basket protector we have had.
Coaching - Brown, Carlisle, Vogel. You would have to go with Larry Brown above the other two. Also a factor is the rules were so different back in 1995 that it was easlier to play defense back then.
The Bird years the pacers were solid defensively as a team, but not nearly as good as the 4 teams discussed here. You added Rose and Mullen, Smits and Mckey both were not nearly as good. if it weren't for Dale Davis, the late 90's teams would have been poor defensively