I miss the way on 01/02 you could use specific man marking yet the game was aware that you meant the opposite guy in the formation.
On 07 it just becomes tedious to keep changing because as soon as the AI recognises you are using it starts swopping strikers, wingers, central midfielders. And when they have wingers who can play as strikers and vice versa it becomes a nightmare. That damn AI is a slippery bugger
To answer your question in 07 it always seemed like the AI strikers would have an outstanding match if I specifically man marked them. I tried at first on 08 but found the same thing. Although it could just be a combination of my paranoia and coincidence. Or it could have been my players were crap.
I reckon when you had 2 defenders marking Torres you must also have had the closing down at the perfect setting as I have seen 2 cb backing off to mark a striker while the midfielder strolls casually towards the box.
But if others have had success with it it probably points more to the fact that everything else has to be perfectly set for it to work effectively. How you do that I haven't a clue. Maybe one of the experts can throw their 2 cents in.