I wouldn't say that I'm necessarily smarter than my parents, but they seem to be sort of inarticulate at times. I don't know if it has to do with their age, or if it is just something I haven't noticed before. They forget words a lot, and stumble over their sentences because of it.
My dad, in particular, can never manage to remember what things are called. He'll make up these stupid nonsense words for everything. Like, "thing-dang-doodle" or "hooby-wooby".
It annoys me so much sometimes, that I'll pretend not to know what he's talking about(even if I do), until he gets the proper words out.