Since team talks play such a huge role in the game( try replaying a series of games changing your team talk and you will see) it would be great if SI or any1 here on the forum could tell us more about it. Its very hard to be always getting the right things said, and with one mistake you can say goodbye to a series of games(even if you are the favorite). I mean when ppl complain about the shot/ratio problem and losing to lower teams they should know that 50% of your team performance come from tactics and the other 50% come from team talks and morale. So if you are using a tactic for a long time without problem and your team starts a bad time it should be because of something you said. I know there are a thread on the tactics forum saying its a FAQ for that, but since team talk is very complex(takes in account the mentality of your team and of your player AND the status of the game) that thread isnt enough.
If anyone could make a serious manual about that would be appreciate and maybe that bunch of players that are quitting the game because they cant win from nothing will start to understand the game deepness