The headlines are at present misleading if the Spiegle media report online is accurate, it states:
"The archeologists still don't have final proof that these are the gas chamber foundations, but everything suggests that they are -- the position between the Himmelfahrtstrasse, the crematorium and the remains of the barracks of the Sonderkommando -- the mostly-Jewish prisoners responsible for removing the bodies -- as well as a water hole. Last Wednesday, experts from Auschwitz visited the site. "They immediately said, 'That's it'," says Haimi."
"...Everything suggests that they are..." is not science and is surely just speculation until there is definitive proof and IMO the archeologists should keep quite until incontrovertible evidence is discovered. Only that will silence the deniers once and for all.