Many types of light aircraft such as the Tecnam in the article, achieve improved directional stability when weight is lifted off the nose wheel. The issue mainly comes from the shape of the tire where it is too “square” across the bottom and too much weight on the nose results in the feeling of riding on the backbone of a poddy-calf, for those farmers amongst us.
The other issue with these small tires is that they are near on impossible to balance in some cases and the whole front end of the aircraft will shake until it slows down after a high speed takeoff. The bigger and heavier Cessna style wheels appear to not suffer as badly from this issue, if at all.