TheDragonKing
King of dragons
This page explains it simply. Like Greedy Chibi said the damage has been decreased, though the increased critical hit ratio is only seen when you raise your hit ratio; the baseline is still the same as always.
Regardless, critical hits were definitely not more common prior to Gen VI.
I perfectly understand that, but the move Roserade used, Magcial Leaf, is not one of the moves with an increased crit rate. I was probably just unlucky. Oh well, I was mistaken.