The issue of leg room comes up quite often and not meaning to be argumentative but talking about leg room with short people is like discussing what whiskey is the tastiest and smoothest with a Baptist.
IMHO my definition of short is anyone under 5'18" :B.
I have for years had the driver seat taken out of my cars and remounted back, all the way forward is where all the way back used to be and I drive with my arm out the back side window. I have had the drivers seat in my RV raised 4" to be more comfortable, the down side is as I am driving I am looking through the blue strip that is across the top of the windshield I can not sit in standard airplane seats or many concert seats.
So to me any I mean any additional leg room even an inch is important and to the short people I am sure it is not.
