Which among the following is false regarding Huntington's disease?

HD patients eventually develop behavioral and cognitive disturbances and the majority progress to dementia. So early onset of memory loss is not a feature of Huntington's disease. HD is characterized by rapid, nonpatterned, semipurposeful, involuntary choreiform movements. Dysahria, gait disturbance, and oculomotor abnormalities are common features. With advancing disease, there may be a reduction in chorea and emergence of dystonia, rigidity, bradykinesia, myoclonus, and spasticity. Depression with suicidal tendencies, aggressive behavior, and psychosis can be prominent features. Ref: Harrison's Internal Medicine, 18th Edition, Page 3330