You're not off, Mac.
OP, your car doesn't have a U-joint, but uses flex discs. These are to be regularly inspected. If they're allowed to deteriorate you may sense vibration, but usually no noise (noise occurs at the point of failure). Unfortunately if it fails it can result in lots of collateral damage.
So if you have not had them inspected get that done. It's a visual test, cracks and deterioration require replacement. Do a search (here and on the net) and you'll find pictures of bad ones.