Wrong. To add to Moorea's post
Primal Might - Patch 3.0.2 (2008-10-14): Removed the 20-hour cooldown.
BC Meta Gem transmutes also had a 48h cooldown, reduced to 1day in patch 2.1.0 and then removed altogether in 3.0.2
Mith>Truesilver / Iron>Gold used to be 48 hour cooldowns, dropped to 23 then finally to 20h in 2.4.2, when all profession cooldowns were reduced.
Removing and reducing cooldowns is not unheard of.
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