This thread is one big shitstorm...
On topic: No, Zac shouldn't be making 500/day; firstly because it's not 'healthy' for a 15 y/o to make that kind of money, because he will lose all sense of what is normal, second because it has to do with his gear. People making 500/day film with high-end 100.000$ rigs. Zac has invested what, a couple thousand in his DSLR set-up and let's face it, for an edit that's ok, but people filming for 500$ a day crank out higher shit than he does.
Personally I don't know too much about video but his edits are with the better up here, but not anything like what the big producers bring out (PBP, L1P, TGR, MSP etc.).