With the new updates in the last day or two this feature is now available on my MacBook Pro. You may have to update your computer to get this feature but it works for me.
Although I did miss understand it, I thought it ment press two fingers on the button to right click but it is actually two fingers on the trackpad and a single finger (or more, doesnt make any difference) to right click.
I reakon by October this will DEFINATELY be supported on the 15" MacBook Pro. But might not be switched on by default - simply a case of ticking a box in system preferences.