I couldn't disagree more. Their "bad" example:
> To download W3C's editor/browser Amaya, _click here_.
Is extraordinarily clear. I'll click the link and it will either download directly, or it will be a download page.
In contrast:
> Get _Amaya_!
That suggests a link to the Amaya website, not a download page. That's not effective for a download.
Similarly:
> Tell me more about _Amaya_: W3C's free editor/browser that lets you create _HTML_, _SVG_, and _MathML_ documents.
This is terrible. It's not about downloading, and "tell me more" is the command, but not linked! For all I know, the "Amaya" link goes to a corporate landing page, not the "tell me more" information I actually need.
The conventional uses on the web are totally fine:
> To download W3C's editor/browser Amaya, _click here_.
> _Download Amaya_, the W3C's editor/browser.
The idea that links shouldn't be verbs seems very silly to me. Links should absolutely be verbs, when they involve an action like downloading or finding out more. Obviously that's different from "reference" links like in Wikipedia, where you're finding more about a topic.
And "click here" makes it exceptionally clear that a link isn't merely a reference link, but an action link. When I see:
> Get _Amaya_!
That... doesn't tell me how to get Amaya. That tells me "Amaya" is a reference link, not a download link.