Snake - you hit the target when you speak of "RTW equipped."
There is so much hyper-inflated interweb bloviating on the weights of various bikes and how that affects their usefulness. Then, the very same characters that nickel and dime the weights of stripped bikes, proceed to pile pounds and pounds of excessive weight in the form of hard cases, fancy lights, custom seats, racks, skids, crash guards, and a litany of other superfluous crap that is not even taking into account the amount of "stuff" they pack to take with them.
I just did the TAT last summer on my Tenere as many of you know. I knowingly brought a "heavy bike" so I purposely packed ridiculously light so the end result was a bike that could easily cruise at 50+ on good gravel roads all day or tractor over rough terrain with ease. The below photo shows the Tenere fully dressed on the TAT somewhere in UT - everything in one Giant Loop bag and all my electronics in divided foam padding in the OEM topbox. I wish I had weighed my bike + kit, cuz I betcha an ice cold beer that my total of bike + kit was lighter than a fair number of the same for guys on bikes with half the displacement.
So my takeaway is... pick the right bike for your trip and then pack accordingly. For me... Fancy was most definitely the right bike for my trip and I'd take her on it again without hesitation.