That he "started early" could easily be explained if these addresses were weak brainwallets
No 
I've received several privatekeys directly from coinwallet.we were in email contact
and I suggested them to use https://bitcointalk.org/index.php?topic=1166928 for stress-testing
Quote
BTW, are there 791 published private keys now or have I been missing a post?
I've counted the same number.