Oh no Fred!
Not all of the articles are negative on Linux. Why, there is a nice article on the Linux vs Windows Server Showdown that basically says its a hetero world where both OSes live and share together. Oh, what a happy glorious sunny picture of Red Hat servers virtualizing Windows servers and Windows servers virtualizing Red Hat servers!
As for the other article, on Windows and Netbooks and data insecurity, the whole problem here is not Netbooks it is Windows 3rd-party application developers. XP is part of the problem, surely, but Symantic and Norton need to shoulder a huge part of the blame with their rabid bloatware. They've become fat, dumb, and happy leeching off the ever-increasing computing power of the average laptop/desktop. Netbooks today have, allegedly, beef comparable to a "4 year old laptop". I think they're better than that, but taking that comparison at face value the 2009 edition of Norton or Symantic is a huge bloated nonfunctional bloatware pig if you try to run it on a P3-800 512mb 4-year-old laptop with a clunky old 60gb hard drive. Thats what a "4 year old laptop" implies. Maybe not quite that bad, but darn close. At best, a "4 year old laptop" might have twice the horsepower as that, but nowhere near today's "average" of an Intel dualcore clocking 2.0ghz or more an 2+gb of ram.
The Windows Netbook problem is that a brand new Netbook chokes on commercial antivirus software, and chokes on Windows security software.
But a Linux thrives on the same Netbook, even if you add antivirus and encryption. You can fully encrypt an Atom netbook and put it side-by-side with an unencrypted Netbook and hardly notice any performance hit. You'll use a little more CPU on big disk read/writes with encryption, and maybe a few extra kb of ram.
Linux may not "rule" the Netbook market, but as an OS it thrives on Netbook-spec computer hardware.