Indeed it does. Experience does count. My experience of what happens in two homes - our old house and the one we are in now tells me it costs no more to get the whole “fabric” of the house warm than heating up the air within it then allowing a cold house to cool that same air all over again.
No disrespect but I am wary of those who cite 20 to 30 years of experience as justification for not taking on board a concept they disagree with.
I have often found that the “experience” they really have is just one or two years but it is now 20 to 30 years old..