Reading the posts and comments here, one would get the idea that GNU/Linux is not advancing in the USA. Not so. Check out LXer’s database of migrations. By far, the most migrations listed are for the USA. Some of that could be language barriers since LXer is an English language site, but it is clear that many in the USA find GNU/Linux quite serviceable.
One of the first entries was a small business, a pharmacy with a server and 5 clients. They were running NT in 2004 when support was cut off. They found the business software had a release for GNU/Linux and the result was the system ran faster with a one-time cost of migrating.
Another entry was University of Detroit High School and Academy needing an upgrade. They depended on NT and that other office suite. Moving to LTSP would obviously save them money but they had to check out OpenOffice.org thoroughly to be sure. It worked and they got the added benefit of improved performance on the same hardware, something I have observed many times.
Some of them are migrations from UNIX operating systems like Largo, FL, and Kenosha, WI. Kenosha had 300 PCs and only 5 IT people and smooth sailing. They migrated in 1995 and were still happy with GNU/Linux a decade later when those who made the mistake of going with that other OS were being beaten by waves of malware and higher licensing costs.
Lots of migrations were only about servers but businesses large and small saw lower costs, higher performance and higher reliability from GNU/Linux, which are also desirable on the desktops.
Georgia’s library system, faced with a $3.5 million quotation for a new server and web application/database, bought a server cluster for $250K and hired two programmers to lash together a brand new Integrated Library System using FLOSS components on GNU/Linux and released EverGreen, first-rate ILS as FLOSS. 1000 libraries now use it.
The FBI used FLOSS for its Emergency Response Network.
Google, of course, may be the largest user on the planet on servers. They use GNU/Linux on the desktop too and have produced Android/Linux and Chrome OS.
The USA has lots of High Performance Computing using GNU/Linux.
The fact is, GNU/Linux works everywhere for everyone and the whiners’ claim that GNU/Linux is flawed is only based on lack of appearance on retail shelves. What are they going to do next year when more machines running Linux are on the shelves than that other obsolete OS? Even the USA, the strongest user of that other OS can see the benefits of using FLOSS and .