Call me a bat but the Watt sound to me exactly like they measure. I believe that the word bright should be change to harsh. In regards to the break-ups, you need to keep in mind that when these get agitated, distortion levels of the entire tweeter rises. That is where the harshness come from.
If you are hearing those things, it is all in your head IMO. That or I must be very lucky. I'm 33 years old and I'm not hearing any of these issues in my setup... :D