Random thought: 93% of all statistics are made up on the spot 
JManley, I think I'll take that same EXACT approach when I have children that age. Very practical and attainable. Bless you, sir.
I knew you were gonna say that.

JMan, Coincidentally, I just finished telling a colleague the story of the day my 15-year old daughter came to me while I was cooking dinner and told me that she was ready to have sex. I don't feel like telling the story all over again, but maybe later.
Anyway, as you can see from my avatar, I now have a beautiful baby granddaughter. My emotions, from the day I got the news to date are:

For whatever it's worth, I totally agree with you. My daughter and I have an extremely close relationship. We talk about everything (as evidenced by her telling me she wanted to have sex). The rule in my home was that, in 8th grade, she could get phone calls from boys, in 11th grade, she could go on a group date, and in 12th grade, she could go on a one-on-one date. (I used grades instead of ages). At no time at all was she allowed to have premarital sex. This was the rule, written in stone, and not debatable. Obviously, she broke that rule... lol.
Honestly, it's my opinion that some children will stray from their parents' teachings regardless. But, nonetheless, it's still our responsibility to instill values and self-respect in them, and just pray that they do the right thing. I think that whether your wife yields to your preference (which she should, because she's not the head of the home) or you decide to yield to hers (which you can, because you're the head of the home

), there's still a chance that things can go wrong with your daughter.
I just think it's more likely to go wrong if you make her wait until she's 17 to converse with boys. (Chances are, she'll just sneak around, and that's the LAST thing you want).
And I have one last thing to add. A lot of the other parents may disagree, but it is my STRONG opinion that when a teenager (or pre-teen, God forbid) decides that they are going to have sex, there isn't much ANYONE can do to stop that. Period. You can't talk 'em out of it once their minds are made up, so the best thing to do is take preemptive measures from the time they are toddlers (yes, toddlers), and pray for the best.