[oscars300]

Most likely. Because frankly, diet soda does NOT:

-Contain a significant amount of energy.

-Cause any significant insulin spike.

Hence, diet soda making you fat would be something of a scientific miracle. Only epidemiological studies link diet soda to obesity, etc., but that says more about the crappiness of epidemiological dietary studies (a general phenomenon) than it does about diet soda.

The cancer and general health issues are more complicated. I don’t think it’s terribly dangerous, but I try to limit my consumption.

[Myrddin]

I see lots of people ordering a diet drink to go with a double-deck cheese burger and fries. Some calories are avoided that way, but it's minor compared to the 2,000+ calorie contribution of the food.

There are some indications that the body reacts to a sweet taste by dumping some insulin into the blood in anticipation of the arrival of carbohydrates. When the carbs fail to arrive, the drop in blood sugar spikes the appetite. The only fix for that problem is real food. Drinking plain water would have quenched thirst without provoking insulin and inducing hunger.