This statement assumes that there was air in the brake system to begin with.If the process is done correctly as per the bulletin procedures ..... then the pedal should be noticeable firmer after the update.
Not all vehicles affected by the recall will automatically have air in the system. The potential for air in the system exists, which is why the caps are to be properly installed, even on vehicles that have not been getting air into the brake hydraulic system.
If a vehicle doesn't have air in the brake system to begin with, bleeding the brakes will have no affect on the pedal feel.
So far, of the many vehicles I have performed this recall on, I have had ONE vehicle (an Odyssey) that truely had a low / soft brake pedal due to air in the system.
Quite honestly, I believe that many (not all, but many) of the individuals who report a noticeable improvement in their brake pedal after completion of this recall are exibiting a placebo effect.