As topic, none of the bonus stats for throwing tree works, quite possibly because you can't actually equip throwing weapon while the game expects you to.
Also you can enchant throwing items on Krong Anvils for no real reason as the stats don't apply. If you get your throwing items enchanted with a special magical effect (such as sets on fire, or vampirism) it will never trigger, possibly as for it to trigger you'd need it equipped.
Well as far as I know, long range never trigger effects, this is true for both throwing and crossbow. Which has both good and bad because now you can have 12 fire damage from Hand of Belimawr without ever running out.