Apple is trying to see what the reaction is. They've got some negative press recently for pricing things a little too high (say a $1k monitor stand or $700 wheels). They're watching to see what the reaction to the rumor is. If people say 'no one would ever pay that', then they'll dial it back a bit. If the reaction is 'eh, maybe for those specs', then full steam ahead.
Either way, they can just deny the leak as a rumor without any basis.