The best would be if it would be possible to code up superpoll to be adaptive, and in effect, benchmark itself to come to the same conclusion, dynamically. So if one day the kernel people fixed epoll to be better all the time, Mongrel2 would magically not use poll() much on systems using that kernel, and favour epoll.
Of course, that's often Kinda Hard To Do (tm). ;-)
The first four digits of 1/0.6 would be 1666, the Annus Mirabilis. So you could compare Mongrel2's multiple request handlers to Isaac Newton first splitting light with a prism.
Of course, that's often Kinda Hard To Do (tm). ;-)