My brother is a military service member. Will this speed up the process for a green card, once he petitions for me?

My parents brought me to the US when I was 3, on a visa. I am 19 years old, completed all of my schooling in the US up to High-School. I found out I was illegally living in the states and could not have continued my college education, so I voluntarily left at 18. I am currently enrolled in an institute in Mexico City. My brother married a US citizen, and received his green card. Later joined the Army and shall obtain his citizenship upon completion of Basic Combat Training on November 25, 2011. That you very much for your time and attention to my question.