No, the theory is a fallacy. The best handling vehicles are the ones with as close to 50/50 weight distribution as possible. Since the spec was an average of about 25 lbs for each tub, the CoG moves from around 40" behind the front axle when empty to about 65" behind the front axle when fully loaded. That keeps the weight distribution between 42/58 and 32/68. Moving the rear axle forward changes the distribution when loaded to about 24/76 a situation that can really mess things up if there load starts to bounce around. Of course, in use, the tubs are strapped down with those cam-locks.

It will negotiate normal street corners without problem. A U-turn is still possible in a space that is at least 25 ft wide, but as you might expect, the movement is more like that of rotating the front wheel about the rear wheel. For really tight maneuvers, I recommend the operator dismount and, facing backwards and straddling the front wheel, use the handlebars as if moving a low flat dolly.

The beauty of the cable-operated kick-stand is that the rider need not worry about balancing the load while dismounting. Even better is that the load is only about 8"-9" from the ground and if you come alongside a curb with the sides just overhanging, the bike can be set down on the curb without much tilt. Though that seems like a lot less clearance for turning, it still calculates to cornering at about 0.5G... more than most riders ever do on any bike and way more than any fully loaded cargo bike should be going.

:)ensen.