Actually, most studies IIRC show that Neanderthal features usually fall outside the range of modern humans. In my page here (
RedRival Free Hosting) I showed that the brain volume/body mass ratio of Neanderthals is lower than the
H. sapiens ratio, also their semicircular canal curavture (Hublin et al. 1996, Nature 381: 224--226) fall outside the range of modern
H. sapiens.
And of course Neanderthals are humans. Australopiths are also humans IMO.