Snead is focusing on one specific attribute, albeit one that the rest of us may not be in a position to be aware of, and one that would set Von apart as a GM, in his comment. Re-read. It's high praise, but a falt-out endorsement. It's obvious, though, that Snead respects Von.
There's a lot that goes into the GM mix. Is Von a good administrator, or would he become one?