'Sprightly' is defined in my Concise Oxford Dictionary as 'vivacious, lively, gay' with no reference to age, so why anyone should be upset about being so described is beyond me.
I wonder if taking offence where none is intended and getting upset about such things is a contributory factor in hypertension?
The one I hate is the patronising 'ah bless' when you say anything positive about the life of an an older person.
Just after my DF's 90th birthday I commented to a friend that he wanted to give up one of his (many) committee memberships but couldn't find anyone prepared to take on the work. My friend's comment was an 'Ah bless' said in that patronising tone kept specially for old people, small children and dogs. It seemed so inappropriate and patronising applied to someone, regardless of age, who was sound in mind and body and playing an active part in their community.
I can see that janeainsworth - and when it's coming from someone of that age it makes it better somehow. But the rest - it's like when people talk loudly because they assume you are deaf or somehow have lost your faculties simply because you have grey hair (and I have seen this on a daily basis) and that's wrong and irritating at the same time.
But I think the point the article is making is that many people think it's fine to patronise you or treat you as some sort of pet thing just because you have reached a certain age. It happens all the time. It's not right. But it's not to say that younger people don't get patronised too or that that isn't wrong either
I don't really identify with any of that. I think the article shows a) sense of humour failure b)another attempt to police our language, now political correctness has run its course and c) the modern tendency to take offence at the slightest thing, and make a virtue out of it.
It is not only older people who are spoken to in deprecating ways - people of other age groups are too, and everyone deserves respect, not just older people.