I personally read "sceptically" to imply the idea of seeing whether the study falls victim to significance bias -- e.g. once you see it, you see it a lot, but is it an indicator of a widespread habit, or just a not-particularly-unusual one?
Edit: And indeed if you read on a bit about Ekrich, he suffers from sleep disorders for which he takes medication. That's a potential risk factor for significance/confirmation bias here, I'd have thought. But there's no reason to jump to the conclusion that fabrication is being suggested.