This thread is about whether the window sticker numbers, provided by Subaru in compliance with the EPA testing requirements, are accurate for this car.
Not how this car compares to others, but whether those numbers are accurate.
Because Subaru does not warranty this car in comparison to other cars. Some cars get 10 year/100,000 mile warranties. Your Subaru does not.
Subaru also makes no claim that if your other car gets better than the numbers posted on the window sticker, your Impreza will do the same.
The fact is you can achieve the mileage on your sticker if you drive it at the speeds that the EPA tests specify, but you don't want to drive those speeds, because your time is more valuable than that (minimum wage, grandma).
Your time is so valuable yet you keep this argument going, when any objective person looking at the data you provided can see that I am right, and you are wrong.
As consolation for being wrong, and because you prefer to compare this car with other cars rather than admit your own data supports the HWY MPG number shown on your window sticker, try to remember which car you would rather be sitting in if someone accidentally drives into you at 50 mph.
My bet is it would not be your toyota corolla.
But you will probably argue otherwise, since you like to do that.