This article about 'Linux being Easier to Secure'
impressed me, and agrees with what I've seen and believed about
performance of Windoze vs. *ix.
Note that this doesn't state that 'Windows is
in-secure' but does make good points about it being 'more difficult' to
secure.
I'll post it now and try to follow up on it:
ZDNet Blog
System calls for Apache to deliver a web page:
System calls for IIS to deliver the same page:
