...And I agree with these guys on the Shockwave:
YouTube
I've seen this video, love how they don't actually have a Shockwave on hand so they just use a standard pistol grip shotgun and act like they're the same thing, always the makings for a proper experiment or argument.
And no, your typical vertical pistol grip is not at all the same thing as a Raptor birds head grip. The Raptor grip greatly reduces felt recoil due to the fact that the recoil force isn't directed straight back into the shooter's palm/wrist, which in turn lends itself to faster follow-up shots.
Also, when you begin testing based upon preconceptions and the whole point of the test is to prove those preconceptions correct, folks tend to inevitably reach such a conclusion.
Typically I like Ian Macallum, but this is a case of bias overpowering logic and a unilateral test performed for the sole purpose of backing up said bias.
That all being said, it's your opinion and you're welcome to it, just be aware that the test you're basing said opinion on is inadequate by default since it neither includes the firearm it is attempting to showcase the supposedly lesser capabilities of, nor does it even include a shotgun with the same grip installed.
Is the Shockwave as controllable as a Shotgun with a Shoulder Stock? Of course not. Is the Shockwave as controllable as a Shotgun with a standard pistol grip? No, it's substantially easier to control.
So yeah, if you want to make the argument that the Shockwave is more difficult to shoot than a standard Shotgun with a stock, then have at it, but it's actually far easier to handle than a Shotgun with a vertical pistol grip, as anyone who has actually fired one will attest to.
By the way, as previously stated, I chose the Shockwave over a standard Mossberg 590 because the cramped quarters of my living space would have made maneuvering a standard 590 extremely difficult to the point of it being a liability. The Shockwave on the other hand, is short enough in overall length that I can easily maneuver it around while still holding it at a ready position.