I'd say this reflects the understanding of most here. I don't think any of us have found ourselves in the position of "all carbs are bad" from our own research and experimenting (n=1). Unless I'm reading it wrong, Guyenet's position seems to basically support Taube's conclusion, only taking it a little further and suggesting a certain type of carbohydrate. That still follows the idea of good calories and bad calories.
It does seem like sweet potatoes are one of the best carb sources out there, assuming they fit your goals. Other carb sources like rice and potatoes seem to only be avoided because more nutritionally dense foods are available (they have more vitamins and such).
As far as Taubes book, I'm still working through it myself. It's fairly thick But as far as carbs are considered... it's still goals, goals, goals (some things are common for any goal, but I think the conversation must always start with what the goals are...).
No Taubes hypothesis is very much in opposition to what Stephan is proposing. Taubes hypothesis is simple Carbohydrate raises insulin, causing insulin resistance, insulin resistance causes obesity. In this paradigm carbohydrate content of the diet or refined carbohydrate is the root causal factor driving obesity, with genetic propensity for adiposity being the only major confounding factor.
Stephan points out that simple doesn't accord with the evidence, studies show post prandial insulin isn't strongly corelated with insulind resistance, and hyper-insulinemia is itself not directly correlated with obesity. This is backed up by the observation of a great variety of traditional cultures which ate very carb dominant diets while having nearly non-existent obesity and metabolic syndrome incidences.
Obesity instead is driven by reward value. Carbohydrate content is one of a variety of food reward factors including fat, sweet, salt, and texture. Many of which are dose dependant, that is more sugar is more rewarding up to point after which point it becomes less rewarding, the same is true of fat content bacon is more rewarding to eat then lard, salt salted almonds are more rewarding then pure salt, etc etc. Industrial food is designed for maxed out reward value because that promotes an addictive response which drives deman for food products.
The food reward paradigm explains why a raw fodd fruit and nut diet and meat dominated paleo diet can both cause reduction in adiposity and metabolic syndrome.