"Tick-tock" release cadence?

[Bruno Wolff III]

On Sat, Dec 06, 2014 at 07:25:48 +0100,
  Kevin Kofler <kevin.kofler at chello.at> wrote:
>
>The updates-testing repository is only supposed to be used for packages that
>will eventually hit the regular updates repository. It is NOT a dumping
>ground for incompatible upgrades.

Part of the reason for this is that it creates problems for testing minor 
(as in small, not as in unimportant) updates for the release that is 
in the base release or updates. Suppose there was a 9.4 release of 
Postgresql in updates-testing for f21 and an important update for 9.3 became 
available. It would be hard to get testing of the 9.3 update while the 
9.4 version was also in testing.