As all of you know quickscoping got a lot more popular in Modern Warfare 2 where players would run around the map using their sniper rifle in a mobile fashion. Quickscoping got more popular when Infinity Ward introduced Sleight of Hand Pro for quick aim down the sights.
A twitter used asked David “Vahn” Vonderhaar if they planned to do anything about Sleight of Hand Pro being used for combination with Quickscoping and he replied with:
Originally posted by another user
Sleight of Hand Pro does not work with any sniper class weapon
David is known for his sense of humour and a tendency to tease the CoD community.
Disabling a quick aim down the sights time would make Quickscoping a lot more difficult to master and less frustrating for the people that don’t like quickscoping.