I agree, I took the 640-441 last year, and i'd estimate
at least 40% of the questions deal with case studies,
and in the version I took, I recall some questions
dealing with ATM, TR, and SDLC issues, routed and routing
protos, etc. I used the Cisco Press DCN book to prepare
for my exam.
It's no cakewalk, and anyone who assumes it is may be
in for a huge surprise (passing score is still 755).