You're confusing anon with 4chan. There are lots of anon that can hack, then there's the ones that think they can hack (4chan). It was 100% not 4chan but saying that anon can't hack is just downright wrong.
You're also confusing anon with 4chan.
Anon = not a group
4chan = group
It's 4chan that's saying they didn't do it as a group. And I highly doubt people who can get into Sony's servers are 14.. you're confusing anon with 4chan again.
And to anyone else reading, I know 4chan isn't the only anon website but it's generally what people confuse as the whole of anon.