I just came back from Guitar Center and played a few new Les Paul studios which have the mystery wood fretboard. The sales tag indicated merely that it was a "hardwood fretboard" , much in the way they describe cheap $100 acoustics to be made of hardwood.
The board had the color of rosewood, but had no pores at all. Not to mention it was extremely dry, your fingers would get stuck while doing string bends. And the guitar couldn't stay in tune at all