What impresses me is that the other two not professional editors. And they're guys --- almost everyone I know who loves quibbling over the placement of a comma or the capitalisation of a word is, like me, female. Make of that what you will.
Speaking of The Economist Style Guide, I was reading it on the bus and an older gentleman (probably in his 60s) sitting beside me keep glancing over my shoulder at the pages. Eventually he asked me what the book was. I showed it to him and he nodded approvingly, then asked where he could buy it.
Even geekier than reading the Style Guide, I realise, is triumphantly spotting typos in it.