I find it difficult to believe that "Competent Staff" ranks so low.

Even with the very best people most projects will foul up without user involvement, management support, decent requirements, etc.

That is to say, the above table looks an aweful lot like a checklist for agile methods

More like a list of the things that agile methodologies try and address. For example the agile-folk approach to getting a "Clear Statement of Requirements" is rather different from that of the non-agile folk :-)