Robert - thanks for that, but mainly thanks for finding this thread!
A few GCAers including me played the course on Monday and I am here to report....
The tee is really just an elongating back of the old tee, stretching it to a 235 marker which is a few steps from the back of the tee. I doubt the back markers will actually be placed at 235 very often as it is so close to the back of the tee. They were at about 225 on Monday. Still even the addition of those 8 yards makes a difference... and if there is a back pin, well....
I tried one from the 235 marker and it's absolutely driver for me, if I want to make the green. The shot I hit was decent - hit hard, but pulled, into the hill short of the left front bunker. Had I hit it straight, it would have made the green. However, it is a damn hard shot and I don't believe I'd get more than 1 out of every 4 or 5 on the green. That being said the fine-player Rob Chestnut smacked a driver to 20 feet just about pin high to a back pin.
I imagine for the really long hitters it won't be driver. But it will be a long club. To that back pin it's about 255, very very uphill.
In any case this was always a great hole, and the back tee just makes it that much better. Laying up is a very viable play now - however, no layup shot nor pitch will ever be all that easy either.
TH