Blizzard has pushed a hotfix for Wrath of the Lich King Classic, addressing a unique interaction between Albino Snake and Meteorite Crystal. After using Meteorite Crystal, quickly summoning and dismissing the Albino Snake over and over would allow you to stack the MP5 buff instantly.
While the Blue post for the Hotfix was somewhat ambiguous, Enhancement Shamans and other melee using the Albino Snake for their weapon swing timers don’t have to worry, that part hasn’t changed.