  With quantitative numerical simulations we show that the secular variations
of the even zonal harmonics of the geopotential do affect the measurement of
the Lense-Thirring effect with the nodes of LAGEOS and LAGEOS II at a \sim 14%
level. Thus, the 1-sigma total error in the performed test with the 2nd
generation CHAMP-only EIGEN2 Earth gravity model amounts to 51%, contrary to
18% claimed by Ciufolini.
