I made some assertions in this post
which I am now realizing were unfounded, to wit, things about insulin reaction and sucralose. Now I can't even recall where I got that information, but on further reading, looks like insulin reaction with artificial sweeteners is not straightforward at all.
Some sources say "no calories, no insulin reaction". Other sources say "sweet taste triggers an insulin reaction" -- in other words, it's psychosomatic. The implication of that is that it would occur with all
sweeteners, or with none of them. And also that it would vary from individual to individual.
So, the plus side of that is that I feel a lot better about sucralose, which is good, because it is much cheaper than Xylotol and Stevia. I still like all three of them, though. And I am still determined that, even after my strict dieting is over, mine is going to be a sucrose-free household.