I don't know if I'd say the Stang "embarrasses" the GC Track, but yes, it is faster out of the box. I know the GC is not as fast without the latest ECU update, and it will put out some more power on 93 octane (rated at 314 with 91), so I think in real world driving, they are probably pretty close.
In these sort of discussions it always comes down to personal opinions of what fits better. Yes, the stripped down V6 Mustang is a bit faster than the GC Track as tested, but it's close enough that it's not a deal breaker IMO. I prefer driving a car you don't see everywhere, and isn't something that there are eleven zillion of out on the road. I'll admit, and I was a Mustang guy for 14 years, I can't stand the whole retro styling that seems to be in these days. A lot of these V6 Mustangs will be rentals, so you will have even more of them out there.
I'm in NH, and to date I've only seen one on the road, and it was from Vermont. Everywhere I go I get people looking and pointing at my car, and asking me questions. I had a guy in a Ford F-350 pull up next to me at a light and ask, "Hey, what is that? I bet it goes!". My favorite type of driving is to hit some curvy back roads, and have some fun. This car is better suited to that type of driving than any of those pony cars, even the Mustang which still handles well, unlike my old '92 GT. Add to that the warranty difference between the cars, especially the 7 year corrosion, the price I got it for, and all the goodies inside (NAV, Voice control, USB port, Push Button Start, etc) and this was the perfect car in this price range for me. If i didn't get this car, I probably would have spent more money than I wanted to get a G37. If the Mustang would have finally dropped the retro look on the new ones, I'd probably be looking at a GT.
I guess in my age group, and the car guys I know, I don't see a lot of people who would ever even mention a Hyundai in the same sentence as a Mustang/Challenger/Camaro. I agree that is narrow minded, but it is what it is. A lot of those comments, while fanboy in nature, reflect the perceptions people still have in regards to Hyundai and a true sports car. If you asked me before I drove a GC if I'd ever own a Hyundai, I'd have laughed at you. I knew they made great cars now, but trying to think of them making an actual sports car seemed out there. No offense to the Tiburon, but I don't really consider it a sports car, mainly because it was always lacking in power, and was FWD. I went to the dealership looking at driving a Genesis sedan, and didn't even know the GC existed.
Anyway, I guess we will just have to agree to disagree on this. It's all good...we are all car guys and have different opinions. Nothing wrong with that!