brendangregg is clearly trying to educate people who may not be aware of the difference between "CPU is busy" and "CPU is doing useful work." You already know t

brendangregg is clearly trying to educate people who may not be aware of the difference between "CPU is busy" and "CPU is doing useful work." You already know this, and that's okay! You're not the target audience. I concede his title was slightly on the side of "I'm going to say something simple and catchy, then walk it back a bit with a nuanced explanation", but I'm willing to give him slack considering his numerous (http://www.brendangregg.com/portfolio.html http://www.brendangregg.com/portfolio.html) contributions to the literature for analyzing systems performance.