it's been about 24 hours as well for my "payout" and nothing is showing in the blockchain either...
Guess i'll be using one of my backup pools

It shows in my payout history... But nothing was sent.
2013-11-07 19:06:16    1MHMVAgTNTZjDzq2SNhQVkG3VSAFGPqmXg    1.01 BTC

My guess would be he used the same password on another site.
That or he probably got complacent and choose a weak password so it would be easier to remember.