Woh, dude - I wouldn't get carried away. We have not yet proven anything of the sort...
You made very good points about the duo of DC & DMC doing better statistically (in terms of on/off Plus-Minus) than the duo of Rondo & DMC.
That is still miles away from proving ANYTHING statistically (just as Brick's initial stat-related observation was in no way proof of anything):
1. The small difference in +/- you noted between the 2 duos would be far from significant, I presume (and none of us has so far attempted to run a significance check).
2. Some of the 4 samples (minutes on and off for both 2-man lineups) were quite small in size, and the samples varied wildly in size, too. For instance, the minutes sample of DC & DMC together on court, without Rondo in the lineup (i.e. DC plays PG) - is actually SO small, and so negligent in comparison to the other 3, that it should never be used at all...
3. Some other variables may have been skewing the picture.
I don't even have to suggest what they may be, as I'm not the one who has to carry the burden of proof, but I may as well mention a few examples:
First, what if the heavy presence of Rudy Gay (heavy in terms of minutes) in the lineups featuring Rondo+DMC had a bad impact on the team's D and fg%, resulting in a drop of our +/-, while in the lineups featuring DC+DMC we had Casspi and Acy in SF, and their grit and 3 point shooting were the factor that tipped the scales in favor of these lineups?
Second - remember Karl's reluctance to give WCS significant minutes earlier in the season? Well, that was exactly the time when Collison was out and Rondo had to play as a single PG. Could it have been that the lack of Willie's great D has painted those long minutes of Rondo+DMC together in darker hues?
And at that same early period - perhaps the very fact that Rondo had to play the full 48 minutes in some games (much of those minutes with DMC) made his production worse?
So... While you certainly casted a well-put shadow of doubt on Brick's argument,
you have not yet proven him neither right nor wrong. Can we agree on that?