Not at all happy with these new airs. Toasters!
Will try the I5 but am thinking of just getting a refurb 11 inch air and going back to what I had!
Other than a few helpful posters here I ultimately had to go through both the i7 and i5 to realize the difference.
It is huge. I'm now running an i5 11" and an i5 13" ... so much cooler not only underneath but the palm rests too, and the fans don't kick in near as often.
For example on the i7 when in Win7 via Fusion while working on a design file, installing Windows updates, a few drop box folders the fan would roar and it was definitely hot not warm on the bottom.... doing the same thing with the i5 it's not hot, warm but not even real warm. Less noise too with the i5 I had to put my ear near the vent to hear if the fans were on.
So yes, the difference is big. All the benchmarks, comparisons, reviews why anyone just doesn't get to the point and discuss real world use I don't know.
Good luck on your exchange, I think you'll be much happier.
* Please post back your results.