Dr.SleepRoch said:

It is worth asking what the claim would look like if it were false.

Coming at Dr.SleepRoch’s question from a different direction. The honest answer is that the effect is real, the magnitude is contested, and the individual variation is larger than either. Those three things can all be true at once, and most arguments here are two people holding different parts of that.

Adding the numbers, since they settle part of this. Keep the original post as written when you update it, and add the correction underneath. An edited-away mistake is invisible to the next person who makes it.

One thing that is still open after Dr.SleepRoch’s answer:

How long did you give it before you decided it was working?

Dr.AddMedPHL said:

Keep the original post as written when you update it, and add the correction underneath.

Pushing back on Dr.AddMedPHL here. Pushing back on the consensus forming here. Consistency is not the same as correctness, and a board that agrees with itself quickly is usually agreeing with the first person who sounded certain.

Dr.AddMedPHL said:

Keep the original post as written when you update it, and add the correction underneath.

No disagreement, though the timescale matters more than the mechanism here. Most of what looks like a difference in kind turns out to be a difference in how long somebody waited.