Axle Placement

I have read this many times in the TM Forums over the years.

"TrailManor provides uniquely easy towing per pound due to the very low wind drag and the very stable ride resulting from axle placement."

I stole that statement from another thread.

Somewhere along the line it was decided that the tongue weight should be between 10% and 15% of the trailer weight. A higher tongue weight usually providing more stability. Axle placement changes tongue weight. Looking at the TM specs, all models have tongue weights between 10% and 15%. Other manufacturers have trailers with tongue weights between 10% and 15%. How does the Trailmanor axle placement make it more stable than an ordinary trailer?

I am not looking for an argument, I just want to understand the statement.