I agree. Please edit your title to state it as a question.

"Why hasn't it leaked"

As far as the reason why, becasue it hasn't....

I'm not sure if you noticed but they are trying a different promotional strategy.
The soundboards live is the leak.

Record sales aside, maybe Jon wants a strong first week of sales. Someone like myself might wait a week or two to purchase it if I have a leaked version. Now I will go out same day. Jon put some effort into this CD promotion. Aka the album cover.....