Yep.
Unfortunately, it doesn't look like that is going to change anytime soon. I can't really blame Ford though. Lets say they come out with a lighter Mustang with a N/A ~370hp 5.4L engine and tight suspension in the low $30k range - it would likely run with the EVO and STI, but it would make it harder for them to sell their mostly visually tweaked (and more profitable) GTs for the same or more money.
For the knuckle dragging gearheads, I believe the Camaro (IRS/400+hp) will fill the "pony car performance spot" between the GT and GT500.