Correct, and the EPA has not done their testing yet, so these numbers will be updated later this year.The asterisk for the fuel economy numbers:
*All values are in US mpg. Preliminary data subject to change. Final fuel economy values will be published prior to launch. Always obey local speed limits.
I suspect the number in the brochure is a very conservative preliminary estimate. An artificially low estimate would prevent lawsuits for false advertising if the final number were to come in under the estimate.
In real world, even with brand new engines, users are getting a decent amount better than that with the gas engine.