Joseph,
You said “The rule is the opposite. Shorter dating = healthier marriages & less divorces. (There are exceptions to every rule.)”
A number of the posters that disagree with you backed themselves with either stories that they themselves have seen, or from speaking to therapists or other professionals.
You have failed to bring a single reason why you hold as you do. You just keep insisting that things are that way, do you have a reason for assuming this to be true or not? If you have a reason please post it.