The benefit there is that port injection can supply supplemental fuel which would be very nice for tuners. Those who have followed direct injection turbo tuning know that fueling eventually becomes a major problem when pushing output of the motor. Port injection would also alleviate some of the issues with carbon buildup. You get the best of both worlds with this setup and it is a very innovate approach that the aftermarket in certain direct injection applications is attempting to replicate.
The rumor originated from an administrator of the Fourtitude Audi forum and is as follows: "The US engine will NOT feature dual injection as seen with the Euro model. As a result, the EPA hasn't yet given finalized hp and consumption figures and thus their absence from that table. Also, he suggested the US-spec engine will be about 280 hp due to the differences."
Less horsepower and direct injection only? Why? Neither Audi or Volkswagen has confirmed this information but let's hope it's wrong.