Will I have problems with bieng at law school at the age of 20?

I am 18 at the moment and have only one year of college left, I will graduate, May, 2008. I want to do law but have heard rumors that if you start law school to young you will be unable to finish, or if able to finish school to get a job. I have done all of the work that juniors in college have. I am going to a respectable university and have a high GPA. Am I to young to go to law school? Are there any detriments to going to law school that young?