Hey, Dick. I assume you are referring to Cycles Renderer. I'm sure some people have touched it, but rendering with Cycles affects the rendition, not the texture itself. In the context of texturing a 3D model, all textures are images, though not all images are textures. Therefore, yes all textures on this site (and every other site) are simply image files. The "touched" status of Cycles has no bearing on it regardless.

There are some proprietary "texture" file formats that include more than just image information, but such formats are not considered the industry standard definition of "texture". More like "textures with benefits". Let me know if you have additional questions. :)