Books make you learn excercises. There is a place for them, but Logo lets you learn by doing, and by seeing. It doesn't try to teach you algorithms, and math, and optimization: That comes later. All logo tries to teach you is what programming is, and why it's fun.
Although, The Poignant Guide has a special place in my heart as well. It may not introduce programming amazingly well, or anything, but it managed to transcend the format of tutorial, and stands alone as a fascinating and entertaining read. I didn't care about the ruby: I wanted to know what would happen to the cartoon foxes, and if The Originals would be stopped.
After coming back from something involving a very weak course on programming (You know how they say that you can either teach what to think or how to think? this teaches neither, somehow.), it's wonderful to see in logo, scratch, the Guide, hell, even SICP, a willingness to teach not only how to think, but why it matters, and the joy it can bring (not that I'm suggesting we use SICP to bring in kids. shudders)
Between somebody who learned a bit of Logo, and maybe was given some excercises, and somebody who did the Hour of Code, one of them has a better understanding of what programming is about, and is more likely to see its appeal (hint: It's not the kid who did the HOC).