They did it on the HD2 promo too - touted the slomo capability of the new camera, then ran loads of footage through Twixtor on the promo, potentially giving the impression this footage was off camera.
In terms of the footage, they always shoot in great conditions with excellent light, not some damp forest in the UK, which really helps. I have some ski footage from clear days that is amazing - and some grainy rubbish using same settings on a cloudy day.
Camera looks great, very tempted, not least because the smaller lighter camera should be more stable on the mounts and better on the lid. WiFi option with no weighty backpack very tempting for framing shots from a smartphone too.