The site also mentions assurances from David Rutter that the dev team has a firm grip on the unpredictable Impact Engine, so there won't be any unrealistic animations and collisions this year. Apparently the engine has received some optimisation and plenty of new impact values for the the hip and the upper body.
Dribbling will require more than just changing direction in FIFA 13 and free kicks have been tweaked too. Up to three players can now gather around the ball, feints and last minute adjustments to shots have also been added.
Finally, defensive set-pieces have undergone improvement, as has the offensive AI, which is now better at running routes and predicting pass options.