I think this is all about your workflow and a matter of personal preference.
The most profound piece of this post was the part where he mentioned that typing was not his bottleneck but thinking is. That's so true and it's what we should keep in mind when deciding to use one of these languages. Who cares which one of the cool kids are using it. What matters is "does this reduce mental strain while still achieving what I set to do with the same result I'd get with normal (HTML, CSS, JS, whatever)"? If the answer is yes then get out your compiler and start writing in HAML/CSS/LESS/SASS/SCSS/Coffescript.
The most profound piece of this post was the part where he mentioned that typing was not his bottleneck but thinking is. That's so true and it's what we should keep in mind when deciding to use one of these languages. Who cares which one of the cool kids are using it. What matters is "does this reduce mental strain while still achieving what I set to do with the same result I'd get with normal (HTML, CSS, JS, whatever)"? If the answer is yes then get out your compiler and start writing in HAML/CSS/LESS/SASS/SCSS/Coffescript.