Linda,
I agree completely. I don't get the "boobs to the tube" advice at all. If you watch good climbers, they sit up and back with shoulders down and relaxed, and hands light the handlebars, sometimes with fingers open. The position opens the lungs, keeps you from expending energy in the arms/hands which is useless, and allows you to use the big muscles in the back of your legs/butt, which are much stronger than those in the front. It's not an aerodynamic position but you don't need that on a climb generally.

