Why would you think it's BS? The Model S gets over-the-air updates all the time; if I recall correctly, they increased the ride height a while ago through an update after a car drove over a metal wotsit, causing a puncture in the battery compartiment and a fire.
They can probably update the settings for the brakes as well, as long as the underlying mechanicals support it.
They can probably update the settings for the brakes as well, as long as the underlying mechanicals support it.