[talmand]

From my understanding most browser use border-box on form elements by default anyway. That's why they often look different from other elements with the same styling.

[yogo]

I don't think so. There are endless blog articles online that have addressed this, e.g. http://davidwalsh.name/textarea-width

[talmand]

I was going by this, http://www.paulirish.com/wp-content/uploads/2011/gplus-boxsi..., which I believe doesn't include textarea as one of the elements involved.