[joeysteele]

There are so many people in their 60s and 70s and beyond.
Who seem to have more energy that those over 20 years younger.

Around 75 though is where I would myself think of someone as elderly.
Not that it's derogatory as many that age and above rarely look or act that age.

My own incredible Grandmother when she was alive never permitted herself to be thought as elderly until she was 75.
I've taken my view from her.

I agree wholly with Niamh, it depends on the person really.