I don't think that guy has tried the full shred in the right guitar or at ALL... The FS is by far the least fuzzy of all the duncan high output pickups... Its also the tightest and clearest, and no this is not a opinion its a fact.
I actually just picked up and installed a custom/59 hybrid for my main guitar based on how well i liked it in that video. Have to say so far im loving it.
I bought a PRS SC250 awhile back that had a Full Shred in the bridge. I couldn't stand it. It had this nasty, ice-pick to the ears spike around 6k that was just horrible. Threw some Dragon II's in there and I haven't looked back.