I think since that article came out sass included a new very nice feature in the form of mixins[0].

Also, Compass[1] is awesome when working with sass, but I don't know if there is a less equivalent.

[0]http://sass-lang.com/guide#6

[1]http://compass-style.org/

SASS is backed by Ruby, so you can take advantage of all of Ruby's power, including reading from the filesystem.

For instance, combined with Compass, you can read image sizes and automatically pull in width and height for a class. Or you can more easily make sprite images via a mixin that knows the size of the image and how many rows/columns you have.

I've been using bootstrap-sass since it was targeting bootstrap 2.3. They've done a great job of keeping up with bootstrap development, so it's great to see them officially supported. It wouldn't shock me at all if Bootstrap eventually moved over to SASS officially in the future.

Short answer; preference.

Official support from the Bootstrap team rather than third-party support. Sass and LESS releases will be hand-in-hand now rather than staggered.

Using Bootstrap pretty much meant that you had to use LESS, now you can choose between Sass and LESS. The differences are not that big, though.

In addition to what has been said by others, the Rails asset pipeline supports Sass out of the box. Now Rails developers can use Bootstrap without bringing in third-party LESS support into Rails.

Preference really. But most of the front-enders I work with seem to prefer Sass for some reason and thus have been pretty dedicated to Foundation in the past. With this official port being introduced it makes bootstrap a more viable option to those who spend most of their time using Sass.

You can copy existing CSS into a SASS project using SCSS.

Seems to me Sass is preferred because of Compass tools.

It's on the homepage http://getbootstrap.com/

Oh I see. I have been using this https://github.com/jlong/sass-bootstrap