Wrong. On a RWD car maybe, but even then it's not even noticable.
Unless you have it custom made by a race team and pay gazillions, your claim is B.S. Stop blaring facts when you have no idea what you're talking about.
A stupid aluminium wing you buy at Pep Boys won't have any effect on your handling. It'll actually slow your car down, because it creates drag. And make it impossible to leave your trunk open on its shafts, because of the weight.
It's for looks only. If you want to get all the 15 year old girls at the local high school, buy one.