A colleague at another firm has posted content to their blog that is pretty clearly derived from a talk I gave in 2012. (The order of points, the language, and the examples are all very similar.)

Their post has about 700 views in two months and will probably continue to generate 100 views or so a month.

I know the person in charge and I suspect she doesn't actually realize this happened. My guess is that someone at their organization saw my talk, made notes, and then with time, the source was forgotten and it became their own.

When I write, I'm very careful about giving credit where credit is due. But I can't decide if this is a case where I should point out the similarities?