Since Google makes quantum computers available as a service, I’d say that qualifies for “sufficient capacity.” To be fair, the computers are not yet available to the general public. Still … I’d say this is a significant amount of resources.
Regarding the specific statement that you quoted, the statement comes from Google itself, attesting to its own Sycamore quantum computers. Photonics did a pretty good summary of the research, and a link to the original research in Nature is provided at the end. Google also put together a really cool promo video as it demonstrated what it calls “quantum supremacy.”
As for Dr. Wing’s article (or any other article that is jargon-heavy), distill the main points presented in the article. When the students have become stronger with the vocabulary later in the year, then revisit a portion of the article and dive a little deeper.
You also could visit the concept of computational thinking with additional resources, especially if the students are having difficulty with the main points in the article. You can find presentations given by Dr. Wing herself on YouTube, including one presented by Microsoft Research. You may also like a video presented by Harvard as part of their CS50 course, or perhaps take a side trip with an unplugged lesson on computational thinking from code.org.
I love seeing feedback on this course! Thanks for sharing!
 Hardware | Google Quantum AI
 Sycamore vs. Summit: Google Claims Quantum Supremacy | Tech Pulse | Dec 2019 | Photonics Spectra
 Quantum supremacy using a programmable superconducting processor | Nature
 Demonstrating Quantum Supremacy - YouTube
 Computational Thinking - YouTube
 CS50 2019 - Lecture 0 - Computational Thinking, Scratch - YouTube
 Unplugged Lesson in Action - Computational Thinking - YouTube
See all of my MakeCode Arcade games and extensions here!