From Danger Room:

The images, acquired by the GeoEye 1 and IKONOS spacecraft — both belonging to commercial satellite operator GeoEye headquartered in Washington, D.C. — corroborate the general layout of the Xian Aircraft Corporation Y-20, the existence of which has been confirmed by Beijing. They also underscore the emerging consensus among Western experts that the Y-20, while outwardly impressive, could lack the performance of even much older American, Russian and European transports.