I fail to see what is stupid about it.
andy roddick is the only yank player of today's era who has a history of routinely skipping european clay tourneys. mardy fish, ryan harrison, john isner and sam querrey do play most of the important clay euro tournaments with relative consistency. james blake used to as well but has fallen back in the last 2 seasons. not sure if that's due to his low ranking, injuries or something else...
i don't think there was a need for legenda to make such a generalization these days.