The following, Alffe, is a link to a NY Times article -- May 2012. It states that Pick's / FTD is:
".... is different from Alzheimer’s, the most common form of dementia. But it is perhaps even more devastating, because it strikes younger people, progresses faster and, unlike Alzheimer’s, does not attack memory at first but begins with silence, apathy or bizarre personality changes. It is thought to afflict at least 50,000 to 60,000 people in the United States...."
It's also all-too-often mis-diagnosed, initially. Hard to seek or obtain therapies and services when it's not recognized for what it is. Therefore, it advances, and, possibly, more quickly than might, otherwise, be possible.