I look forward to seeing a dyno graph comparison between the 14 and 15, for all we know the updated 5.0 has more torque and power accessible throughout the rev range.
420 to 435 might not sound like much but it will probably pave the way for better increases in the future than the existing...
So lets see,
*More power than current GT- Check
*Better performance than the Boss- Check
*Whinging that its not enough and will get its ass handed to it by new Camaro- Check