On the sixth edition of Search Pulse, Tim Mayer informed that Yahoo! like MSN and Google will soon be supporting the NOODP tag which will help a webmaster to tell the search engine not to use the description from the ODP directory. The only reason that seems to be relevant for Yahoo to do this, is that it does sometimes use the ODP description in the SERPs and has it has already been set up as a standard meta tag.
When asked as of why didn't Yahoo! commit to releasing a version to opt out of using the Yahoo! Directory title in the SERPs, Tim replied:
(1) Tim said their algorithms are good at figuring out when and when not to use the title.
(2) Tim said, they don't want to create yet an other meta tag without really needing it.