OK folks, you're getting a little excited here. Calm down, or the thread gets locked.
By the way, this could be a very interesting topic. The responsiveness (is that a word? responsivity? responsivitude?) of a given fish may not just be measured by how it attacks the glass when someone enters the room, but by other means of interaction as well. Also, it might depend on the size of the tank, kinds of tankmates, ambient traffic in the room, temperature, etc.