Sorry crzy - but that's simply not accurate. Try experimenting with stopping distances with just your rear brake, then just the front and you'll see the rear brake provides very little actual stopping power - it's mostly to be used in conjunction with the front for balance and poor road conditions.
Motorcycle Braking - Motorcycle Safety Information and Resources
The dual brake lever is somewhat problematic in that you can't alter your braking for various conditions (sand, rain etc,) so while with independent brakes I'll tend to use only
the front (good conditions obv) - I've set my dual brake lever to be about a 60/40% split with the primary being the front. While I could better my stopping distance with even a 70/30% or greater - I fear the sandy corner