not on the highway, and not if the stick driver isn't shifting at the optimum shift points. I doubt anyone buys stick just for gas mileage.. most people who take stick these days are driving enthusiasts and as such are doubtful to be driving within EPA guidelines, if you know what I mean
That depends on the gearing of the car. My car, a 97 maxima, does get a little less on the highway than the auto verison. I would like to see some numbers on the 6 speeds though out of curiosity.
If I were going to get a truck for towing, I would get a manual for a couple of reasons. First, it is cheaper to repair a manual, and if you are towing stuff, your tranny is going to go out a bit sooner. Also, if you are climbing a steep hill, or say going up the interstate in the mountains or something of the sort, and you are in an automatic, you area going to burn out your tranny if it is anything other than new. A manual allows you to keep it in one gear going up hills, and the wear and tear is only on the engine. The automatic tranny is probably going to be upshifting and downshitfting over and over again, etc.
You are correct in that most manual drivers get worse gas mileage due to driving style. I know I do, I drive the crap out of my car. I still get a respectable 19-24 mpg though. (city highway mix). I am sure some people do buy a stick for both gas mileage and to save some on the car. A lot do not though.....