The starters avg 3pt % and "best 3pt shooting starting lineup" are not the same thing.
Agree and disagree. You need context.
For instance. You can have all 5 starters shoot over 45% from 3 but if each starter only takes 1 3pointer per game, then you could be dealing with a ridiculouly small sample size that you need to throw out. Also, it's hard to call that team a 3 point shooting starting team. But, if you have a starting lineup that shoots 40 3 pointers a game at 45% but one of the starters doesn't shoot any 3 pointers, you kinda have to give that lineup a nod for best 3point shooting starting lineup while they have the best 3 point percentage.
You could have a team that has the highest starters avg 3pt % and the best 3pt shooting starting lineup. It still isn't the same thing.
"best 3pt shooting" includes an implicit claim about the volume of shooting.
Also, (and correct me if I'm wrong) jpotter mentioned the % of each of the starters, but did not calculate their collective avg 3pt %.
I definitely agree about context and with the examples you brought up.
I did calculate their collective average three point percentage in the OP - 41.3%. Also, I made sure to not put this claim/question solely on the notion of collective average three point percentage, which is why I discussed that every single member is both an above average threat from beyond the arc plus a threat to take it to the hole, which further supports the notion that they are arguably a top three point unit of all time.
Also, I disagree about your conception of best “3 pt shooting team” inherently implying a high volume of threes. The term/conception is ambiguous at best and relies on interpretation, which is part of the reason I made this post to clarify (a) how we are calculating the “best” three point shooting unit, and (b) if it is our current starters. Yes, volume is certainly an important consideration in the analysis, but I think you are putting too much into the top end of that metric rather than treating it as a threshold metric, which is how I think that metric should function in this analysis.
Last year’s GS starting lineup shot 26.8 threes per game and made 10.9 threes per game. Compare that to our starting lineup shooting 22.4 threes per game and making 9.1 a game. I think we certainly meet the volume threshold for this analysis, and I don’t think the difference between those numbers completely erases our substantial collective average percentage advantage and the versatility our 5-out philosophy provides compared to their unit of 3 elites, 1 poor shooter, and 1 non-shooter.