No, it is not. NEWS.Debian (install apt-listchanges) states:
cvs (2:1.12.13+real-7) unstable; urgency=high
rcs2log no longer lives in the PATH, the contributed script
and its manpage are in /usr/share/cvs/contrib/rcs2log now.
[…]
A simple locate would have told you that, too:
tg@zigo:~ $ lo
** Package changed: rcs (Ubuntu) => cvs (Ubuntu)
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https://bugs.launchpad.net/bugs/986765
Title:
rcs2log is missing in Ubuntu 12.04
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