It depends. Returned missionaries are advised to marry after they serve their missions. For me, is all a matter of finding the right person rather than when you're actually going to do it.
I agree with Happy. It's all about finding the right person, and if the Spirit reveals to you who that person is, then I don't have a problem with "rushing" into marriage. I do think that some people make mistakes by "rushing" into marriage with the wrong person, but that is not something that I can really judge.