The testing methods to determine EPA MPG'* are quite relaxed for Hybrids. They can test on a dyno in a lab. Conventional cars have very strict real-world testing regulations that are still pretty skewed.
The resale value on the hybrids is very low for this reason. I know 3 owners, and none of them are truly pleased when they compare their numbers to published. A turbo-diesel VW is a smarter choice in the realms of super-efficient.
Laugh at the Hyundai'* on the freeway too. Look at the comparison as you rip by 'em. The power is there when you want it, and you can STILL match their MPG'*.
I assume youre talking about the 4 cylinder Hyundai'* only right? Some of their 6 cylinder models put down some impressive numbers, faster than most NAs here and would give some of the stock/lightly modded L67s a run for their money.