Okay, I'll be fair, they were renamed in 1810 and they didn't start sucking until after 1812. In 1813 and 1814, Young guard regiments were nothing but inexperienced recruits who were drawn into the army by the offer of guard status. In Russia, there were six Tirailleur and six Voltigeur regiments - In 1814 there were 19 of both, plus depot.
They weren't necessary awful soldiers, but their guard status was definitely undeserved.