I agree Dave,
As for fluid designs, yes, they do adapt to the width of the page, but when they do the actual column widths get either way too narrow or way too wide. Best column width for highest reading comprehension is somewhere between 8 and 15 words per line depending on who is writing the article. Most agree on somewhere between 10 to 12 words per line. Like I said, fluid design by themselves will give you line lengths from 3 or 4 words per line up to 20 or 25 words per line as you take the browser width to its extremes. The advantage of Media Queries and my script is that you can change the page layout as the browser width changes to keep the readability high.
Back to my being a software geek, I also wrote a server emulator, MySSI, which gives you all the advantages of server side include, without any of the disadvantages. I use it on this pair of websites to maintain the content of both sites in parallel.