Just look toward the Elantra Sport community apparently they are running the same engines and ES's have been on the road for the past 6+ months. Could even ask your dealer what numbers they're seeing.25mpg combined for the M/T on the GT Sport and 28mpg combined for the DCT on the GT Sport. Not bad at all, I'll be pretty content with that. But we still need to see real world data.
Correct, its almost always a result of driving habits from what I noticed along with other things like environment condition. I think with some of the extreme weather that has been seen across the U.S. and Canada we might see some slightly low numbers sometimes. Wind resistance for example can harm those numbers.Slight differences in weight and what not will slightly skew those results. Obviously though, driving habits and what not would as well so getting a general number with a +/- 2 or 3mpg should be a good indication