What I've found so far:
Eng. Ahmed G. Elnil SphinUX Community Founder, Head Of Kernel Development team, an ex. project administrator at Sun Microsystems, Inc.
[...]333MHz CPU, 256MB of system memory,[...]
the advertised RAM minimum of Puppy and AntiX is also 256 MB RAM I think. And the required minimum not higher than 128 MB.
At least one of the claims has been factually proven to be incorrect as it would be impossible for a os to use 300% or in other words creates twice the ram linux uses out of thin air while the thing itself doesn't use any memory.
Benchmarks or it doesn't happen. Can't wait to see the results!
Since the kernel actually does nothing useful itself, the best metric you can say is that it gets out of the way and lets the application do its work. In that case, the best the kernel could possibly do is get 100% faster, because that would mean that the time/memory/etc that the kernel adds to execution has gone to zero. But 100% is the impossible ideal. (Unless you have some sort of out-of-band cpu and memory, allowing the user-state cpu/memory to be 100% focused, but then that's a different type of overhead completely.)
If the kernel actually produced something useful, then maybe it could actually get 100% or even 300% faster - but it doesn't, and that's not its job.
I find these RAM-Nazis to be quite amusing everytime. How often do you hear stuff like "*mimimimi* Browser A uses 100 MB more than browser B!!!!!" Wow seriously who gives a shit about RAM usage. Might aswell just let the program write everything to disk and use 0% RAM if that somehow is considered to be cool and efficient.