Sources: Wall Street Journal, AT&T, Cult of Mac
quote: Facetime is NOT efficient, duh. How do you think it gets that better video quality? It eats up bandwidth.
quote: It is an undeniable fact that Skype on iOS has SERIOUS battery problems. Leaving Skype running reduces your battery life to less than half what it should be.
quote: it's going to be avoided by savvy iOS users.