Hi Dirk and everybody the point is that r-base and all the other packages will only migrate to testing when all of them will be ready at the same time. Packages need 5 days to migrate to Testing and each upload resets the counter, thus blocking the migration of all. Therefore, a break of 5 days without uploads is needed if we want to see the r-* packages in Testing.
Note that according to the package tracker, r-base will be part of another transition soon. So it may be best to do the 5-day break before it starts. Have a nice day, Charles -- Charles Plessy Debian Med packaging team, http://www.debian.org/devel/debian-med Tsurumi, Kanagawa, Japan