I understand the purpose, but I would question the precision.
When talking strictly about generating speed and "purposely braking", I think it's snake oil.
Yesterday, Yoda shared with me his conversation with Homer on this subject. I'll let him give the first hand account. But, I'm confident that Homer was of the same opinion.
Yoda leaves today for the Barclays, so I'm not sure when he'll get to a computer.