While I somewhat see where you're coming from, I don't really agree, but again, I would be biased since I already know plenty about different build tools. The main statement is that it's a build tool for modern web projects, which makes me thing a-la Webpack and similar. Then it's further specified that it's fast (which Webpack usually is not) and lean (which Webpack definitely is not). For me this already gives a rough idea of what to expect, whereas the Python analogy wouldn't tell me that much.