I lean way more forward than that guy, and crouch lower.
I usually explain it to noobs to bend their knees and act like they're about to plop into a La-Z-boy recliner, but then stop and lean forward from the hips sharply. Feet shoulder-width apart and pointing towards target. This offers the best recoil control, while still enabling the shooter to "Groucho walk", or shift positions easily. It's equally convenient to move in any direction, and if they're wearing armor, it will be presented toward the threat.