I believe they are reading accurate, at least as of three months ago when I had an empty wineador to test them witha boveda.
Hard to say exact times of when the changes occurred but I have been steadily coming down from 68-69 when I first started the wineador down to 65 now. So over a three month period but also to make things complicated a few sticks were rott from the b&m but not all.
I haven't exactly had ideal conditions outside when I smoke earlier with the wind. I would think that could go both ways either blowing it out or fanning it and making it burn faster?