How soon do new releases get packaged into Debian Testing?

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http://unix.stackexchange.com – Mono 3.0 has been released yesterday. I am really excited by this release and am curious to know when this will be available in Debian testing (Wheezy). Is there a standard timeline set by Debian project for when the newest release of a software will be made available into Testing or in general any of the branches, except Stable? (HowTos)