In this case you definately can't plan to be taken out exactly when you want. You have to realize that they'll come get you when they can. Eight hours is a pretty minimal time to wait as some folks wait for days.
As far as Doug's scheduling goes, there is no way that you could know how busy his schedule is.
I think people have the fast food mentality when it comes to Denali. That is, they think they can plan exactly how it is all going to go. In reality, you are climbing a mountain and things never go as planned.
Give a little more respect to DG, he's doing the best he can.