This is the conclusion of a new paper published at PLoS ONE and authored by Willian E. Banks et al.
I have not yet but browsed it but guess that it adds to the rather intense discussion on why did our ancestors replace Neanderthals in West Eurasia and specially Europe, a good review of which can be found at Dienekes.
By the moment just a note. I may write more later on when I read it properly. .