if the ip you get for playing dominion is like it is for playing ai games this game type will be a huge waste of time, so riot make it the same as playing a normal game or better

The screenshot has been confirmed by a riot poster to be a custom game (so -50% IP), AND it was a loss.

From what I've heard, that means about 50 or so IP for losing, about 70 or so IP for winning, and in only a 20 minute game, that's better than some Treeline numbers for sure.

Don't freak out about IP until Dominion actually comes out. The numbers won't be set in stone right after release.