A Respawn developer by the handle of scriptacus took to the Titanfall forums to give us a little new information on the game's sniping class.
"Sniping is in the game, but due to how the game plays it's a pretty different animal than you'll find in your run of the mill modern military shooter. Quick scoping and no-scoping are ineffective."
I imagine this has a lot to do with how much more fast-paced Titanfall plays compared to shooters like Call of Duty and Battlefield. Locking down a target as they're double jumping with jetpacks and running up or alongside walls is going to be tricky looking through a long-range scope.