Question: How do my gameplay statistics get synchronized and uploaded to the Rockstar Games Social Club?

Answer: Before any gameplay data can be received by the Social Club, you must have linked your console of choice to the Social Club, played your game of choice for at least 15 minutes (to generate data) and then synced your data with the Social Club.

If you are playing on the Xbox 360 or PS3, your data will be sent automatically as long as your are connected to PSN or XBL during your game play.

With the DS, you must make sure to SAVE YOUR GAME PROGRESS and then actively sync your stats to get them to the Social Club.