What have we really achieved with Lean & Agile? We may have fixed IT departments, but have we helped organisations? Nokia & Yahoo are two prime examples of once great Agile companies...
And there are also tons of really great companies out there who have never heard of Agile, so it obviously is not a requirement to be great. If you look at those companies you see patterns repeating themselves over and over again. I call them the 7 habits of highly effective organisations.