My wife and I average 7 minutes of sexual intercourse from moment of entry to orgasm. Is this typical?

Answer 7 minutes could be considered a quickie. It's not very long especially for the woman as most women need far more time to get excited sexually, than a man does. Probably she doesn't have any orgasims or more than one, when if you lasted longer she could have many orgasims and would be more happy with her sexual life with you. Anything less than an hour is shameful, as I said above, most women don't get turned on as fast as men so I can only assume she's doing her wifely duties and pleasing you. There is a site you could visit to help you it's called Sex101.com, you might want to check it out. Good luck