Same here, I've had them maybe 25% of the time. I've even seen the FA grab them out of the cart, set them aside, and they were never used. Lets face it, it's more fun to hang out in the back than hand out hot towels.
How are they supposed to serve drinks these days? West flights mix in the galley, east give you two minis to mix on your own. I though they were supposed to be consistent now?