Hi again - glad to see you back!

As I understand it, the letters and blogs and whatever else are useful if there is some question about the validity or duration of the relationship. Obviously, if you're asking to enter the US on a fiancé visa, then ideally you have known each other for a while and spent a certain amount of time together so as to make it reasonable to assume you really are intent on getting married within the 90 days after your arrival.

The immigration officials are looking to avoid sham marriages and situations like in the film, "Green Card" where someone is getting married solely to get into the US and get their green card.
Cheers,
Bev