I had a cousin who did not want any children for the first few yrs of marriage...because he wanted to 'try' out the marriage first to see if it was going to be a lasting relationship. yes thats the 'gora' mentality, lets live together and see if it works out...in our culture more young couples are opting to start families late because they want to be sure they are not tied down in a marriage of convenience just for the sake of kids.
It's not "trying," out the marriage. It's seeing how compatible a family is. You need time as a couple to settle down and understand eachother. You need to solidify your relationship with your spouse before you bring more people (and burden), into the world. It's very smart to wait for children.