Byron, its usually at about 30 degrees. the angle under the jaw makes it seem more upright. Those I had to adjust for the photos. I have a very carefully worked out tying position. Put your fist under your chin, while sitting in your tying chair. Where your elbow comes to is where you want the vice jaws. It is a position where nothing is straining while I tie. Thats why a pedestal is out of the question. The table height has to be so low to accommodate a pedestal that your knees will not go under the table. Then you would be leaning forwards. That position is stressful if maintained for too long. If your wondering if your set up is good try tying 10 dozen flies in a day at it!
Cheers,
A.