Dr.PainCLE said:

The honest answer is that the effect is real, the magnitude is contested, and the individual variation is larger than either.

Mine went the same way, slower. I had assumed I was the exception until I read this.

quinn_sf said:

For anyone reading later: the numbers in this thread are worth checking against a primary source before you act on them, including mine.

Saving this. It is the first explanation that did not require me to already understand it. I will report back once I have actually tried it.

From the other side of the consultation, briefly. It is worth asking what the claim would look like if it were false. If nothing would look different, it is not a claim about the world and no amount of discussion will settle it.

Correct me if the detail matters more than I have assumed.

Dr.KarenChen said:

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

Same pattern here, and in the same order.

Moderator note: a couple of off-topic posts removed. Report rather than reply if it drifts again.