+1, although the relationship to watts and cab voicing and driver specs is a very real and very interesting one, since I've now experienced quite a few of these 'super 15's' and 'super 12's', etc.
It is also interesting that many who carry around 1200 watts would hear absolutely no difference in their rigs versus 500 watts. Not a big deal, but maybe discussion like this can either save some guys some money and weight, or on the other hand, suggest when a lot of watts really is beneficial, regardless of whether you play loud or not.
On the other hand, if it sounds good, it sounds good... so in some sense... who cares!
Fun discussion!