There's a big difference between dreaming "about" lucid dreaming, and having a lucid dream. If you're dreaming that you were lucid, then you were lucid, no matter how much control you had. I've dreamed about lucid dreaming, where I'm talking to someone about being lucid or (unsuccessfully) trying to WILD in my dreams. But if you say "I must be dreaming" at any point, then that's lucidity. When you "dream about a lucid dream", it's probably just low-level lucidity, where there may not be a great deal of realism or control.

At least this is how I think things are.

-Amé