Wood sent me this in an email recently, and it's pretty much exactly the kind of thing i'd like to have on this blog so...here you go.
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First, usually the forehand force is used because it is a more difficult throw. However, I feel this mostly applies to beginners, and most club players have forehands that are as good or better than their backhands. The one exception is probably deep throws. So maybe teams force flick to make deep shots more difficult (although as the level of play increases I think this becomes even less of a factor).
Second, the backhand release and flight seem to be slower (it's not just me is it?). This would suggest it would be preferable to force backhand because it would give your defense more time to react.
Anecdotally, I know that when I am playing short deep in the zone, I am much more likely to be able to get a d on a backhand swing pass than a forehand swing pass. This may also be due to reason three...
Third, the backhand release is such that the thrower's back is to most of the field, whereas the forehand release positions the thrower to face the field. This should make throws to the breakmark side more difficult, and make it easier for the thrower to not see a defender who is in position to get a d.