Slogans

Why are slogans typically with five syllables?

Nokia: "Connecting People"
Toyota: "Oh, What a Feeling"
Honda: "The Power of Dreams"
Hitachi: "Inspire the Next"

Other slogans not with five syllables, but (sort of) symmetrical:

Mazda: "Zoom Zoom"
Microsoft: "Your Potential, Our Passion"
Motorolla: "Hello Moto"
Sony: "Like no Other"