Yeah, I know a lot of the more famous psychics get images that have meaning for them and they know what it means. Like when one of them sees a Rose they know it's a grandmother cuz their grandmother was named Rose or whatever.
I do know that the guides give me symbols that I will understand even if my sitter won't. I recall one time getting a Wizard of Oz image and my sitter who lived in australia had never seen it. So I had to explain it a little more than for someone who had seen it already. Coincidentally, she wrote back a week later to tell me the WofOz was on tv there and she finally saw it.