I wouldn't be confident in anything that claims to predict enthusiasm level to the hundredth, but that's just me.
Either way, unless you share the actual reasoning behind those numbers, you'll be open for criticism for pulling numbers out of thin air.
We can't criticize something we don't know.
I just dont want to make public something that is not completely accurate by now. It might never be but I want to make sure it is as good as my maths skills can do that.
Why should he disclose his analysis when he used numbers gathered from others? Because you will still know better anyway, right?
Unless anybody asks me to do so, I will not share anything.