As far as I know, all registrars require 60 days before you can transfer a domain to a different registrar.
Can anyone confirm categorically that there are registrars that allow transfers transfers to a different registrar before the 60 day period from registration has expired?
Transferring to a different registrant is of course a different matter, and many if not most registrars have some mechanism for this, but keeping the domain at the same registrar.