Based on Achievement unlock percentages, only 11% of players have completed a Featured Multiplayer race: In the Big Leagues achievement in Forza Motorsport
Meanwhile 39% have completed the Career Tutorial: Welcome to Builders Cup achievement in Forza Motorsport
24% have completed 1 Series in Career: Built Not Bought achievement in Forza Motorsport
9% have completed 1 Tour: Just Getting Started achievement in Forza Motorsport