It's one thing to want to hear both sides. It's another thing entirely to come onto a Mustang posting board and start slamming the cars that so many of these people own. If you took some time to learn from these people you would learn just how powerful that 4.6L you have can be.
Sure the old saying, "there's no replacement for displacement" has it's merits, but your logic has the same of some Viper guy going on an F-body site and saying, "boy how do you guys do it with only 8 cylinders?"
It's all in your approach. Had you come on here and said that you now own a '00 GT and wanted to hear some opinions on why you thought Ford has never increased their displacement on the Stangs to compete with the F-body's, you may have had a better reception.
Now you will have to work twice as hard for anyone to ever want to listen to you... It's too bad.