It certainly is a way to prune trees dwarf or otherwise. Dwarf and fruit tells me little. A dwarf cherry grows to 12 feet tall. You can also use pruning to control size. You could keep a peach tree to 5 feet tall for a non-dwarf. That's extreme, 8 feet would be better. But it's up to the pruner as to what size. Rootstock, dwarfing or otherwise matters little.

Anyway yes, you are pruning to an open center. It is an excellent way to prune. All my trees are pruned that way.
With dwarfs say a genetic dwarf peach, you don't have to, but it allows light, and air circulation. I probably would prune it that way. You can prune for a central leader, modified central leader, or open center. Advantages and disadvantages to each method. And the advantages and disadvantages vary with what fruit type. Other pruning methods exist too.

This post was edited by Drew51 on Mon, Nov 11, 13 at 17:54