@AUTHOR: So what if you won 4/5 placement games? You probably just had a good team. Your not gonna receive a high rank if you dropped the NEG bomb, and got carried every game you played.
I'm a Master rank #2. Anyway, I decided to create another account. To see if I would get Master straight away. So i played my five placement games, I won all 5. Every game, I carried. I even dropped 68 kill(s) on Hardpoint Slums.
Search & Destroy I got a 19:2. The other 3 games, were Hardpoint/CTF, each game I got 30+ kills & carried. What rank did i get? Fucken Silver.