This benefit is an aspect of the NW-KL bilateral relationship and is unrelated to Skyteam, so there is no reason to assume that the same benefit will exist in relation to other US members of Skyteam. Some airlines within alliances have stronger ties and offer more mutual advantages than are available throughout the alliance (eg: QF-BA in OW or LH-UA in *A).
AFAIK, DL does not offer that to its own elites, let alone others. CO does (and on NW), so if you often fly full fare within the US and this matters to you, you may want to consider switching allegiance to CO.