I usually run with long passing. I might be wrong here, but these are my thoughts on it:

From what I've read, basically with long passing you pass the ball deep up field as soon as you get it. As a result, you're attacking straight away. As you've thrown the ball upfield, your opponent is often caught off guard, and so you can more easily take a shot at goal. However, your own players are also often caught out of position, and so the shots you have on goal aren't very accurate.

I figure the above is probably true, as I generally have a lot more shots on goal than what my opponent does, however my shots on target are often only equal or slightly higher than my opponent's.

I figure that short passes is probably the opposite. So you'll have longer between attempts on goal, but your shots on goal are more likely to be on target.

I have no idea whether either effects your condition or not.