Michael Spencer

Wait a minute, if the decryption is accurate?! I first read that somehow as you wondering if the source image is accurate.

Here, do the decryption yourself then if you don't believe me.
Google search for EBCDIC table. Click any link. You will find:
C4 is D
C5 is E
C9 is I
D3 is L
D5 is N
D7 is P
E2 is S
E3 is T
E4 is U

E2 == S
E4E2 == US
D7C5D5C4 == PEND
E4D 5E3(C9) == UNTI
D3C5C5C5 == LEEE
SUSPENDUNTILEEE
Suspend Until E3.

It's easy to confirm this yourself. No "if it's accurate" disclaimer required.

Actually if you wanted to, you could change the attribution to read "According to a Computer Science grad student from Iowa, posting on the Penny Arcade Forums . . ." :-) What you already posted meets all reasonable attribution requirements I could expect, so it's completely optional. Feel free to follow the link and PM me to confirm this is me if you like.

I love EBCDIC. (Not really.)

So this is what 15 seconds of Internet fame feels like. :-)