Do skilled cyclists really "use the front brake alone probably 95% of the time"? Sheldon Brown's Braking and Turning Your Bicycle page states that:


  Skilled cyclists use the front brake alone probably 95% of the time


and


  "Generally I advise against using both brakes at the same time."


I certainly use my front brake more than my rear brake, but not exclusively. Specifically, I pull two or three times harder on the front brake than on the rear, and as I come to a stop and feel less traction on the rear wheel, I gradually let up on the rear brake. Sheldon's advice implies that it would be better to use the front brake exclusively.

The page states cases for the exceptions where a cyclist should use both brakes together or the rear brake alone but doesn't provide a rationale for why not to use the two brakes together. In normal conditions, is using the front brake alone truly better than using both brakes, and if so, why?

(Related question: When should I not use my front brake?)
Reference - Cyclecraft by John Franklin


  A cycle takes more than twice as far to stop using only the rear brake compared to using only the front brake, which will usually stop the machine just as quickly as using both brakes. Nevertheless, you should always apply the rear brake, and slightly in advance of the front brake, so that a slight skid at the rear will warn you if you get close to the hazard point at which the bike may tip.