No answer then.
Let me just say that if latex tubes stop thorn punctures I would use them, but how can they? Could you explain to me how a soft tube doesn't puncture after a tyre is penetrated by a thorn without resorting to daft digs at me if you can do that? OK latex can deform, but surely not enough against a needle-like sharp object such as a thorn eh?
As I've already said I'd use anything for a puncture free ride, currently at the expense of using higher pressures (40 PSIG) in conjunction with a tubeless conversion.
That's interesting - so do you confirm W-R's view that you need 40psi in a Stan's/non-UST set up to avoid the tyre coming off the rim then? I'm just surprised because I don't see that reported anywhere in mtbr. Both Stan's and Joe's websites do say that you need to be careful to ensure that the liner precisely fits the rim in order to avoid this issue.
I think it's true that latex is more resistant to thorn punctures, because it's supposed to have seven times the elasticity of butyl rubber. But users say it still suffers from snakebite punctures if you run below 40psi, it leaks air hence the need to pump up every ride (wouldn't bother me though), it's difficult to repair because some patches won't stick and it's prone to catastrophic failure from splitting along the weld. But the other 50% say it's fantastic!
So W-R is happy with latex, you're happy with Stan's/non-UST, and Christophe Sauser is happy with UST. I think W-R is right that most people can't be bothered with anything that's a bit of a faff, and that's why more don't use Stan's. Enough do to have made Stan quite rich though.