DH and I got married 2 days shy of 16months of being together, we were engaged after about 5months and have been married for 3yrs 8months and 2 kids and very happy. We didn't live together prior to marriage.
And personally I don['t think this makes a difference. I think the dating process shows if you are compatible, like each other, havign things in common etc etc etc and the idea of living together to see if it "works out" is a bit of a fallacy because there is always going to be something that you clash on and doesn't "work out" relationships involve being commited to working things out and compromise etc so nope don't think the living together factors in there.
Personally I think it crazy being engaged after only 5months lol but it just felt right and I still think it is right

