Rajon Rondo is tied for fifth all-time (with The Big O) at 8 playoff trip-dubs. Oscar had 8 in 14 years, Rajon's got 8 in six years. Magic leads with 30 in 13 campaigns. In comparison, LeBron James has 6 (six) in nine seasons. Kobe is not even on the list.
http://www.sportscity.com/nba/nba-all-time-triple-doubles-181/
I think this is why a lot of people -- myself including -- find the triple double emphasis to be a bit misguided. Rondo has more triple doubles than Michael Jordan. Does that suggest in any way that he was more impactful of a player? Of course not. Yet, when people see "triple double", they automatically assume a player had a dominant game.
How many people are saying this makes Rondo better than Jordan? Plenty of players average more rebounds, assists or blocks than MJ. Does that imply that all of those players are more impactful than he was?
It's easy to statistically show that someone's a top scorer or rebounder or passer. There's no "non-arbitrary" way to show that a player is very good at multiple categories. Over the last 5 playoffs Rondo's 3rd in AST%, first in Reb% for point guards, and he's the leader in DRtg and DWS for point guards to boot. All of those contributions matter, all of them help us win. Triple doubles don't measure that versatility, but they're representative of it.
Rondo has probably had 50 games where he was better than in Game 1. He played pretty poorly for most of three quarters (3 points, 1-for-7, 6 turnovers). However, because he reached some arbitrary statistical plateaus, people are talking almost like this was a historically great game. It wasn't. It was a great final 13 minutes, and that should be celebrated. However, it would have been a great fourth quarter even if his final stat line didn't include the requisite 10-10-10.
Your assessment of his first three quarters (3 points, 1-for-7, 6 turnovers) conveniently leaves out the 7 rebounds, 12 assists and 4 or so steals he had as well. It wasn't pretty, and it was far from his best game, but even though he was struggling in some aspects of his game he was contributing much more than you're implying. It would have been a great 4th quarter even if his final stat line didn't include the requisite 10-10-10, but we never would have won without the 7 boards, 12 assists and 4 steals that he put in when he was playing "poorly".
I'll take KG's last two games over Rondo's last two triple-doubles. Most importantly, though, each of those efforts came in a win, so the rest is just nit-picking.
KG's getting plenty of credit for his last two games, both here and nationally. But the overall theme of this (and many other posts by other posters) seems to be that triple doubles don't mean much because they're arbitrary, that people can have better games without getting triple doubles, and that Rondo can get a triple double while "playing poorly" (which I would interpret as meaning he's not contributing much to help the team). If it's true that triple doubles are so wildly overrated, how do you explain the fact that they lead to victories so often?