The reason for quotations has to be understood fairly easily: many thing come with "feelings", and less about measure.
And the relevant quote (for me):
http://oreilly.com/openbook/beosprog/book/index.html ) When you dismiss others' views because you didn't bother to fact check, says something about your willingness to improve yourself. In my best understanding, BeOs has for every important system a server (similar with X11, or the print spooler, etc.) and applications are not blocking any of these servers (when in X11/Windows preVista you can), so when you draw something, and it is CPU intensive, this will not freeze your UI, and you can move still the windows, etc. This gives at least the feeling of being very responsive about BeOS (or Haiku).The performance benchmarks, which are especially rigorous, gauge whether an OS has what it takes for applications that have zero tolerance for missed deadlines. These tests include thread-switch latency and interrupt latency.
If you talk about BS, Haiku (nightly) as far as it is stated here (and I trust as being a higher chance of being true, compared with most of what you say), uses GCC 4.7 so the code on the same CPU that does a lot of computations would run (close to) identical on Linux and Haiku. You said: "Haiku, ... (is) much slower than bigger operating systems". If you move the goalpost and state: "it is slower in database benchmarks" or anything of this sort (which was again, not so clear in your initial statement), and you will try to look for a specific benchmark, maybe you will find this link:
It looks that at least around year of glory 2010, you should not use your beloved Linux box but FreeBSD, as Linux "is useless" (as someone told you, in your logic, the opposite to better is useless).FreeBSD 8.0:
For benchmarks, Haiku is using the outdated GCC 2.xx line, so the comparison may not be that fair.
Enjoy doing acrobatics with the facts kraftman