In my personal experience I have not heard of or seen that to be a preconceived thought. It may happen against certain teams or against certain hitters but things like speed, location, movement are more dependent on the weakness of the particular hitter. Every hitter regardless of how good they are has a speed, location, variation of speed, or movement that gives them difficulty. The key is figuring this out......earlier rather than later.
But shouldn't pitches that are slower generally be thrown outside and pitches that are faster be thrown inside?