I read this slide to be about the success rate of admins attempting these tasks in the different products, not milestone targets.
I guess I can read it that way, too, but that's not how it was explained to us by the Microsoft presenter.
Scott is correct. I saw this slide at Lync training in Arizona and the presenters described this as the success rate of completing a task for an administrator that had never used either product.
Thank you for your comment! It is my hope that you find the information here useful. Let others know if this post helped you out, or if you have a comment or further information.