I have spent very little time in Texas but I have heard the phrase “all hat and no cattle” numerous times in my life. I have heard it in movies, on tv shows, and in real life. In real life it was usually when someone who had likely never herded cattle in his life dressed like a cowboy with hat, boots, etc.
The funniest use of the phrase was when a friend at work used it to describe another mechanic who had the largest possible Snap On toolbox there was stuffed full of shiny new tools but did not possess an ounce of mechanical aptitude. Cracked me up.