FACTS
Lets Start of with some facts.
There's 95% chance to get a kill with an awp.
Awp take reflexes,timing,aim and patience.
Pro's use awp not scout because with the scout you have to rely on a good headshot or 2-3 shots.
The Awp is considered a "noob" gun only because its powerful, Like the auto shotty.
When running with the scout its faster than with the knife/ So is a good gun in open areas.
With the scout its vital you take them out quickly or there going to kill you, Because if they have an M4 or AK and you have a scout they have the better chance of victory.
Id say it depends on the map.Lots of space,Open map = Scout because you can shoot quicker move faster, hence less chance getting shot and is far more accurate and accuracy in open areas is vital
Whilst "medium" close quarters area (Office) are good for awp because you can take them out quickly and efficiently.