I'm not Art, but if remember right from Dan's article (see link below), most people like to be slightly higher on their tribike.

http://www.slowtwitch.com/...#Anchor-SADDLE-35882

Dan has commented that most people like to be a half centimeter or so higher on their tri bike than their road bike. I have them both about the same, but don't go by me. I have yet to find a road position that I thought was even on the fair side of poor. I just can't get the road bike right, but I keep trying. One of these years, I will get it for sure.

I agree. From Dan's article it has everything to do with where your seat is relative to your BB. The height of your saddle is a function of this not the sole determinant. Adjusting your seat forward/backwards relative to the proper height of your saddle is the key IMO.