The bonus IP from deconstructing items not crafted by you (i.e. found, quest rewards, other players) has not changed, to my knowledge. The statement you quoted should still hold true--in-game it certainly still appears as such to me. Items you make will give you a dreadfully low amount of IP upon deconstruction, but any other items (from quests, other players, found in the world) will give you much better returns. Higher quality items (green, blue, purple, etc.) and items with Traits (Sharpened, Defending, Impenetrable, etc.) will give you the most IP.

Don't deconstruct things you make for IP. If you have another character, send any items you do make there; that character will receive the IP bonus for deconstructing those items because they were technically made by someone else (your 1st character).

Interesting. I didn't know if deconstructing another player's item gave more IP than deconstructing a looted item; all I ever noticed was that both looted items and items created by other players gave more IP in general upon deconstruction than items I made myself. So, compared to the IP given when I deconstructed something I crafted, I reasoned that anything not crafted by me gave "bonus" IP--which is partly true, I just wasn't aware there was a difference in IP gain between looted and other-player-crafted items.

Very insightful.