Slightly off-topic, but I'm sad that people still use apt-get. aptitude is pretty much just better[1].
Also, if you're reading this article you probably don't need the slightly better performance/throughput of nginx. Nginx's configuration is just terrible. You can cause segfaults and all sorts of unexpected behavior with the If directive[2]. And who came up with the idea that rewrite[3] should sometimes redirect instead of rewriting?
If the replacement string begins with http:// then the client will be redirected, and any further rewrite directives are terminated.
Apache's configuration might be ugly and unwieldy and the community might be horribly infested, but at least the configuration makes sense. Lighttpd has none of the above problems, though.
[1] http://superuser.com/questions/93437/