Yes, it means torque. My wife told me she was kept squeezing the steering wheel and the warning never went away, I tried not to chuckle, which isn't fair because the car doesn't give great clues about what it means (at least now it uses the word "force" instead of "hold"). Things got a lot better for her when I told her it senses steering forces, i.e. torque, and nothing else. Yes, honey, it is counterintuitive because the car is steering and you'd think it would actually be confused by your help, but do it anyway.
No, this doesn't mean I'll never see another nag. Some people are saying they do this already and it's not enough. I think hanging on the wheel would be enough for me, but it represents an uncomfortable amount of strain and I decline to do it, especially over long distances. I expect the car to tell me when it needs some reassurance, and when it does I'll give it... momentarily. If my tires pull, I'll replace them. If the road pulls, I'll put up with it for awhile, but seek another lane or another route. I will not put more continuous force on the wheel than I would put on it if I were driving without the car's help, and in general my car can keep to its lane with a light touch.
So, the car is making me choose between repetitive strain injury and a high-maintenance automation experience. I'm picking the latter, but it's not exactly a fitting choice for a luxury brand.