**Core Concept**
Parkinsonism in people > 70 years of age often presents with a more complex and diverse set of symptoms, including cognitive decline, autonomic dysfunction, and a slower progression of motor symptoms compared to younger-onset Parkinson's disease.

**Why the Correct Answer is Right**
In elderly patients, Parkinsonism can be caused by various factors, including neurodegenerative diseases like Lewy body dementia and multiple system atrophy, as well as vascular parkinsonism due to small vessel disease in the brain. The presence of these additional factors can lead to a more heterogeneous clinical presentation and a slower progression of symptoms. Additionally, elderly patients with Parkinsonism may have a higher likelihood of developing dementia and autonomic dysfunction, which can make diagnosis and management more challenging.

**Why Each Wrong Option is Incorrect**
**Option A:** This statement might be true, as elderly patients with Parkinsonism often present with a more complex clinical picture. However, it is not the correct answer as the question asks for the statement that is **except** true.

**Option B:** This statement is not necessarily true, as elderly patients with Parkinsonism may still develop significant motor symptoms, including tremor, rigidity, and bradykinesia.

**Option C:** This statement is not necessarily true, as elderly patients with Parkinsonism may have a slower progression of symptoms, but they can still experience significant cognitive decline and autonomic dysfunction.

**Option D:** This statement is not necessarily true, as elderly patients with Parkinsonism may still respond to dopaminergic therapy, although the response can be variable and influenced by the underlying cause of parkinsonism.

**Clinical Pearl / High-Yield Fact**
In elderly patients with Parkinsonism, it is essential to consider the possibility of underlying dementia, autonomic dysfunction, and small vessel disease, which can affect diagnosis and management.

**Correct Answer: B. This statement is not necessarily true, as elderly patients with Parkinsonism may still develop significant motor symptoms, including tremor, rigidity, and bradykinesia.**