What is it that makes some cycles materials not display in the "Textured" view? What is it that makes some cycles materials not display in the Textured view? By displaying, I mean showing with the textures, not like in the solid view.
I have tried un-connecting the glossy nodes, but that makes no difference. I have checked that the Maximum draw type is set to Textured.
The bottom image is one of my problem materials, that is not displaying in the textured view. The top image is just to show that some of the materials in the same scene are displaying in textured view.

nodes that are displaying in textured view

nodes that are not displaying in textured view
Textured view will only display the texture if the texture is an image node.

Noise is a procedural texture and will not be displayed. You need to change to 'Rendered' view to see procedural textures in the viewport.