Nice article, but you just made every support call I handle twice as long. Every user that sees this will be adding SQL DBA to their resume and business card. I can see it now:
SCENARIO: I am called to discuss sudden performance problem on an ordinarily behaving server.
USER: I did some troubleshooting of my own and I am concerned with this thing called 'COLLATION'. I read online that 'EBCDIC' is faster.... When can we make that change?'
SQL DBA: <groan>