Debian is known for its stability. As they require rigorous testing, packages are known to take a long time to become Stable, comparing to other distributions.
In light of the extended review duration, do the security patches of general (non-core) packages have to survive a long wait before entering Stable?
The possibility of the creation of zero-day exploits (by referencing the latest version of a software) during the testing period to compromise an older version in the stable repository seems worrying.
Disregarding the effect of additional software such as SELinux, does the lengthened period impose a security disadvantage, comparing to other distributions?