I am sure there a LOTS of similar examples out there for marketing that promises "15% increase in happiness" for your dollars.
And that is dumb enough.
But making quantitive statements about non measurable for a technical product is pretty bad.
The WORST: the level of dumbness of American consumers (even for technical products) has reached a historic high (I present as proof the number of posters here that have not even recognized the nuttiness of the given example ad). THAT IS SCARY.