How can you say that?
Sure they were. Anyways one of those was Keith Judge a programmer for unreal engine 4 which is supporting directx12 and is baffled by Wardells statement.
Wardell in recent days has contradicted himself.
Now responding to questions on twitter and he's suggesting that directx12 won't close the gap between ps4 and XOne. That contradicts his statement that it would give XOne 2x the performance for most games.
I think Wardell confused his specific case with thousands of individual entities on screen generating masses of draw calls for the general case where there are far fewer objects requiring draw calls in a scene. He's just unfortunate that his enthusiasm ran away with him and now he is a trump card in fanboy wars even if he's been walking back his statements over the last few days.