I dont know for sure. some say it does (on ps3),and some say it just puts you at the bottom of the leader boards (no one said if ps3 or 360)
so to be safe, jump out when 2147 starts flashing. then just let yourself die, and enhoy being up on the leaderboards!
yes your score does go up, but you have to wait. im not playing for 24 hours after im done to be safe.