We've had people on here over the years that have only known each other for 2-3 months, and still got a visa no problem. It all depends on personnal circumstances, what info you supply, and whether the embassy checks are clear. Nothing to do with religeon or colour.
How do you think the people using arranged marriage web sites get there visa's? They know how to get through the process with the correct information, even though the folk have only met for a few hours.