And dont forget, it depends of the internet conection, i play a lot on iPad, and i know that there is a lag of 4 minutes of game time.
At the 4th minute i always have a small break and the possession bar have a change, is that i am only online after those first 4 minutes.
Also since i play 3G conection, sometimes my lag can be of 20/30 seconds of real time, i see that with the subs, or sometimes the game stoppes for 10/20 seconds and restart from the point were it stopped, meaning that what i am seeing had already happened.