I'd agree that dry weight is better for a true comparison, and I'd prefer manufacturers stuck with dry weight to avoid the temptation to cut corners. RTR weight still matters, but only if the typical user isn't forced to routinely carry extra gas and oil. I think the gas tank should be big enough for a day of typical riding (though that gets murky in a mountain sled), and the oil tank should be worth at least three tanks of gas – just to spit-ball some things. Room for, say, three more gallons of gas and another quart of oil will add a couple pounds, perhaps? I'd gladly accept that, even if it means I don't fill the tank half the time. I personally don't carry gas; I've got a 600, and usually get a pretty good day of riding out of a tank. A small tank might not matter to a guy who carries gas to stash before the aggressive stuff, but even some of them wouldn't say no to a bigger (internal) tank.
Probably more into the weeds, but chasing wet weight could also lead you to cutting too much cooling capacity (heard of issues on the Pros) and maybe even skimping on chaincase oil. Obviously the engineers should have that figured out and be making the right compromises, but when they're told "I want the lightest sled, and I don't care what it takes," the results aren't always so great...
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