I think, after a lot of thought, that it is a gimmick, not sleight of hand, and here's my evidence:
AFTER the change, the card is shown front and back, to show it's not a double-backer, double lift, or whatever I assume.
BEFORE the change, EVERY SINGLE CLIP (including ineski) he already has the card in a strange grip, and you don't see him take the card off the deck, or show it front or back, or anything. Instead both dan madison and ineski are very carefully gingerly showing you only the front of the card, and the camera only starts rolling once they have the card all ready.
If this is a pure sleight of hand then I have great respect for DM.
but if this is just a gimmick I have to wonder what is the point, when you could basically accomplish the same thing with the flip/flap "blink" card. I mean even if it's some NEW gimmick, I still will have lost a ton of respect for Dan if that happens. and I put the odds at even money that it is gimmicked, because he won't say either way that it's NOT a gimmick, and neither will Ineski.