Uh, let's clear up a few misconceptions here...
OpenSSH is not `a complete rewrite' by any stretch. It uses a large
amount of code directly from old versions of Tatu's SSH. Indeed, many
of the positive changes in OpenSSH since then were not even done by
the OpenSSH people; they were done by OSSH (which never seems to get
credited). It's quite a misnomer, and a severe disservice to the many
people who have contributed to SSH, to credit it entirely to the
OpenSSH group.
Also, let's not forget than OpenSSH brought us the UseLogin hole, and
that over time the `group that puts out OpenBSD' has been known to
introduce other holes (as documented on bugtraq in the past). Let's
not slobber over it too much without understanding the reality.