it isn't THAT simple.
somethimes agreeing the TIE, can turn back on you.
If for instance the other had his enthousiasm up because of that TIE and you meet him again making it so you loose by a small margin, it might have been better he'd normalled before... ;)
But okay, I know chances are small. I just had to throw it in though.
Don't forget, the other managers benefits from a TIE, so somethimes it's better to let him guess, so he gets scared and plays normal. If you then beat him using TIE, you win double. ;)
They are not your friends; they dispise you. I am the only one you can count on. Trust me.