Hahahaaa NO comment.
I am a female and i was once 17 and believe me that is the time we are the most rebelious! so if anything you will make your wife worse! How can a man talk on behalf of a woman lol. Its a joke! why do men do that??
It really depends on the girl and the guy. It just seems women and men tend to start having more expectations as they get older.
And it goes back to what you mean by mold her.
A married couple usually starts adopting and molding themselves into each others personalities because they start understanding each other better and better. And when someone is young they usually aren't very intellectually developed and their views and opinion on life and the world aren't as strong as someone who has experienced more in their life. Based on that it would be easier for a woman/girl who is young to be molded into the lifestyle, opinions, and personality of her husband, and this is specially true(regardless of age) when the woman really admires and respects her husband.
I am only referring to women because majority of the Muslim marriages are between an older man and a younger woman, and its very rare to see the opposite. And even if you see an oldr woman and a younger man, the age difference isnt too substantial like 5-10 years.
Just ask yourself how strong your opinions and views were when you were 17 and now? There is a drastic difference specially in the religion and how you want to live your life. And imagine yourself if you got married at that age to someone you really admire and respect and love, wouldn't you want to be as close to him and as much like him as possible?