eamon
Explorer
No, a defensive weapon grants you a +1 bonus to AC while you wield the defensive weapon in one hand and wield another melee weapon in your other hand.The new double weapons don't completely work properly. They stuck the defensive property on the main hand end for some reason, but the definition of defensive requires that it be in the offhand to function. So no AC bonus for anyone using a double weapon, as written.
And just to go into over-the-top debunk mode: even if it had said off-hand; the intent would have been crystal clear. Further, note that there's no fixed designation of an "off" hand in 4e in general, so, supposing the rules hadn't said other hand, and then supposing the intent weren't clear, it's not actually clear to me whether main hand vs. off hand is a prescriptive or merely descriptive phrase - so you conceivably could consider a different hand main or off for various purposes (it doesn't actually much matter much for almost anything that I can determine - just so long as the two hands are distinct for any given purpose).
Anyhow, fortunately the defensive property doesn't say off-hand, so we don't need to open any further cans of worms
