Comment From experience, yes. (Score 5, Interesting) 605
While I was teaching the course, I would have the students develop a web site from scratch, with the primary focus being to showcase their ability to encorporate CSS and javascript, and follow the W3's accessibility guidelines - topic was up to them, and I frequently told the class that their content's accuracy wasn't important, as long as it was their own content being generated. (This produced some of the most entertaining things to read at times... "Reptiles of the World" was all about Lions, Tigers, Giraffes, and their political machinations.) There were always a mix of local and foreign students in the class, and frankly, while some of the foreign students hadn't actually bothered learning the local language before coming to the country (or after), their average writing skills are (and have always been) about the same as those of the local students.
Sadly, I must admit, that over the 10+ years that I taught the course, the quality of writing steadily decreased. At first, the average student was fairly literate, and I only had occasional problems with people devolving into instant-message speak. ("Can u help me?" Seriously people, the "y" and the "o" are both within an inch of the "u" on the keyboard! If you're writing a web page, you've got time to search them out and hit them!) During the later years of teaching the course, I found that more and more of the people coming into my class fell into the category I would call functionally illiterate, and sadly, all I can think of to blame for it is schools no longer actually caring if kids learn to read and write before pushing them out with diplomas.
A relative of mine's daughter in grade school came home with an "essay" she had written and received a good mark on - it was full of horrible spelling and grammar errors, which my mother and the girl's mother both made her correct - when the teacher was asked about why the spelling problems were not corrected, we were told "Oh, we don't do that anymore, we don't want to stunt their creativity."