I would expect that Tesla has already thought through this. Once they put a hitch on this thing, they open up a whole new set of performance criteria. If the frame cannot deliver to the hitch the power in the motors, then they set themselves up for disappointing consumers. Worse yet, that configuration could cause structural damage. So I'm willing to give Musk the benefit of the doubt for thinking through this kind of disappointing downside and finding an innovative way to exceed expectations.
We can also see this as a critical step down a developmental path toward a high performance truck. Towing with the X could pique interest while providing Tesla engineers with valuable experience and a test bed. So even if initially the Model X is not the truck pull champ, give them a couple of years. The S P85+ was only able to go 0-60 in 4.2 sec, but two years later, the P85D does 3.2. Moreover, this technology advance is also leading to the Model X. So I think the Model X could pave the way to a high performance truck.
Current truck esthetics exaggerate bulk, as if mass conveys power. But I think that Tesla will offer a lean esthetic. Power comes from efficiency and superior design, not from bulk. I believe that Tesla can subvert the bulk = power paradigm.
