as with all these things, probably yes.
laptop adapters also have their own efficiency rating, unrelated
to eco plug load's 80plus test.
laptop adapters have a little area on the information label that
mention the efficiency level, ranging from I to VI, with level VI
being the most efficient.
most laptops shipped during the windows vista era will have
adapters conforming to level IV, while most laptops shipped during
windows 7 era will have level V adapters.