Value-Driven Development - Agility is the Tool, Not the master by Tom Gilb

The article: http://www.gilb.com/tiki-download_file.php?fileId=431 is really worth reading.
It is a fundamental opinion / critique on the way we apply Agile Manifesto and I really wonder what is your opinion on this and I'm looking for some spicy discussion. Maybe Tom himself will join in.

His main message is that you can have happy customers, but still fail. The reason is lack of attention for stakeholders value. In other words, quantified business improvements.

For me, his work is somewhat confusing. On one hand, I like many of his idea's, they match perfectly with Agile principles and I apply them often. It feels like a missing peace in Agile world. On other hand, almost nobody I come across knows his work and some well-respected names are opposed to his idea's, but the arguments are missing.
What is your opinion?

Viktor Grgic, http://www.leanarch.eu