Guitar weight has NO bearing on tone,period. I have had heavy guitars that sounded thin and brittle, and ones that sounded big and fat. I have a 6.5 lb tele that sounds big and fat, and once owned a strat that weighed over 9lbs, that was shrill, and lifeless. Weight became a topic of great conversation, right around the time that many players started to get older, and all of a sudden weight became an issue. Then it morphed into a tone issue, les Paul's now were limited to 9 lbs, or less, because that's where the tonal boundary ended. If it sounds good it is good, weight has nothing to do with anything other than they get tiresome to leave strapped on for several hours.