Garen's Crit
I just started fiddling around in the Practice Mode with Garen (with full crit damage runes, in case the numbers are weird), and this is what I found out about his crit damage.
This is also done on minions, with 0 armour.
Total AD (normal auto attack): 540 Crit: 1500 Multiplier: Around 3x as my build expects
Now,
Q AD scaling: 850 Crit: 1900 Multiplier: Less than 2.5x
Is that intentional? Because it doesn't say anywhere that it's supposed to be like that.