[jmount]

The amount of data rapidly factors-out. One cat get the effect even for millions of points in 6d. It is the complexity of the model solution which is going to be degree D-1 polynomials over a shared degree D-1 denominator that drive the effect.

[mnky9800n]

I may be misunderstanding, but wouldn't you see this effect any time you did a k fold cross validation?