Earlier quoted context omitted.
Gimp eh? Well we're not going to put that in the article. We're serious people.
I would have been fine with not mentioning GIMP had they said "an open-source alternative" or something. It's the fact that they called it a "knockoff" that made me realize they have no idea what they're talking about.
They don't care, and why should they? They're so much used to Photoshop the name has become a verb, and just want to get things done.
It is not the end of the world that GIMP is being compared to as a Photoshop "knockoff". Many would also agree that to get users to even consider or migrate to using GIMP, it would need to look more like Photoshop and be compatible with it.