Well, it certainly does go by quick. 30 seconds of lag at most. Better than most duplication lagfests.
Well, you are comparing a program made by a billionaire to an add-on made in a highly inefficient scripting language.
And the strange thing is, my other programs update faster. (Opera, Steam, etc)
And they also don't update invisibly. They inform me on updates.
tl;dr: CHROME2012 INVISIBLE PROCESSING