Or at least a lot of people still do, according to a recent study. Go read:
"The Demise of the Waterfall Model Is Imminent - and Other Urban Myths"
by Phillip A. Laplante and Colin J. Neill, Penn State University
ACM Queue vol. 1, no. 10 - February 2004
They discuss some interesting myths, like prototyping - or not.
Thoughts? Comments? :)
(PS: I really don't love Raymond either.)