Don Roncalli's breeding values are higher than those of most Donnerhall sons:
type/riding horse points
Foundation 115
Dressage 127


Below for comparison the WBFSH ranked number one in the world,

Donnerhall son De Niro:
Type/riding horse points
Foundation 121
Dressage 116

German Breeders had super results with him, and those values above suggest great correctness and a leggy type from Roncalli xx coming through.

Don Roncalli Breeding