:(This is not CoolType. I have to say, the worst thing about Linux is it's bad font-engine. This is critical!! If you use fonts with a size less than 8 it looks really bad. Can't hardly be read.
I even prefer the font rendering (kerning) in Windows 95. I'm quite new to Linux. I was suprised to find out that Windows 95 had "clearer" fonts than Linux/KDE, that it's readability was greater. (Even though linux has smoothed fonts.)
I'm beeing totally honest.
Linux (KDE) is really worse than Windows XP in almost any area. Userability and speed is MUCH better than security, for most people XP is secure enough. XP is lightning fast, and has great, clear fonts. Very user-friendly. Great filemanager (explorer), (at least compared to konqueror).
Linux is free, and thus great. But not better than Windows XP, stop kidding. It's a great alternative, but not better.
The font-rendering is especially bad. I say this because if nobody cares, NOTHING will happen. Somebody needs to understand this great font-rendering problem and fix it.

Linux/KDE needs...
* ClearType
http://www.microsoft.com/typography/ClearTypeInfo.mspx (Linux is three years behind.)
* Prefetch. Programs starts about 4 times faster (OpenOffice) in XP. (can't remember, but its a huge difference. It may even be 10 times faster.)
* Menues in KDE has a AWFUL delay, slows down a lot, but in Windows with TweakUI they are immediate.
* Drag and drop, userability, compatibility, speed, **STABILITY** (KDE crashes (almost...) as much as Windows 98 did. (But it's very easy to fix a crash, I agree, but difficulty to install an update)), and aaargh...
Excuse me. Got mad.