mmm not really, no scopes are 99% luck with that 1% of skill being dot on screen and CoD4 no-scope trick. Should see my bro sniping on 1.3, one of the few that knows the hop shots by tapping ctrl. Gotta remember that the hitboxes in 1.3 were insanely big, and registry wasn't a problem. Plus sniper killed one shot to the toe even.
Also, its moar like 50/50. And even then, to no scope with skill (and not cheat) takes even moar. No dots, no cheats here - not everyone who is good cheats, its better if you dont assume that.