You are correct, sir!
"Twenty years ago Stanley L. Miller of the University of California at San Diego predicted that the icy moons of Saturn should include methane hydrate ( CH4 . 7H2O ), that is, methane trapped in water ice." - Tobias Owen on TITAN in SciAm 1982
So the prediction is from 1962
Thanks. I thought my fantasies had gotten the better of me again.