No, Microsoft *claims* to do something nobody could object to -- you're missing the whole point of the statement.
If Microsoft told you they were implementing security and it turned out they were using DES with a key hashed from the word 'Scroogled', would you be pleased? What if they're using good encryption but the keys never rotate? What if the keys rotate but they're on a fixed loop of 16 keys? How would you know?
As an everyday non-programmer, a casual user wouldn't know the difference either way. If however that user is on a fully open source operating system, they at least know that -some- others using that system have had a peek under the hood and still trusted it.