NurseLeah_Nash said:

Start from the measurement rather than the conclusion.

True, with the qualification that this is a self-selected group. The people for whom it did not work post less, and that shapes everything we think we know.

sophie_paris said:

Agreed, with a caveat about community reputation: it is a lagging indicator.

Genuinely useful, thank you. I had the facts and not the framework. Sending this to two other people who asked me the same thing last week.

NurseLeah_Nash said:

Start from the measurement rather than the conclusion.

I read this differently from NurseLeah_Nash, on substance rather than tone. Pushing back on the anecdote-stacking. Twenty people reporting the same thing is twenty samples from the same self-selected pool, not twenty independent confirmations.

Adding the numbers, since they settle part of this. One habit that pays for itself: post the method alongside the number. A figure without its method cannot be checked, and an unchecked figure is how this community accumulates folklore.

Moderator note: leaving this open. It is being argued well and the disagreement is the useful part. No action needed from anybody.