Lies. Every apple charger (and headphone cable) I've had since 2007 has broken or frayed at some point. This goes for Macbook, iOS device you name it. They're simply terrible. The only Apple cables I've not had to replace are the ones in static machines (iMac) and in my 2003 powerbook, of which has that 'ugly looking' anti fraying device shown on the black cable that someone posted above.
"Lies?" That is harsh. I could tell you "You need to learn to take care of your stuff" but that would be equally harsh.
Add me to the "never had a problem" pile. None of my Apple cables have ever malfunctioned, frayed, or been damaged in any way, and that includes:
a PowerBook G4 charging cable
2 MacBook Pro charging cables
2 iPad charging blocks (and cables)
2 iPhone charging blocks (and cables)
3 iPod charging blocks (and cables)
2 extra iPod/iPhone charging cables
multiple no-name, cheapo, dollar-store 30-pin charging cables
OK, I lied.. a couple of those dollar store cables failed, and I threw them away. But no problems with anything else.
Let us agree that there is a huge range of use/abuse scenarios including ambient weather conditions that contribute to wear and tear (humid climates, extreme cold, etc.)