Well that's certainly one hell of a claim. It's one I feel like I should know about considering I've worked with European researchers on human presence in the arctic in the LGM, but I've never heard of this "consensus". Can you provide some more info?

As an aside, the white sands footprints aren't "proof". They're interesting and highly suggestive, but significant concerns remain about the quality of the dating, let alone transbering crossings in the LGM without implicating things like the sketchy refugia hypothesis. It'll be a few years before all that shakes out and we have anything approaching consensus on the matter.