Are shorter barrels more accurate?

[hm2 clark]

I would think that with all else the same the shorter the barrel the less potential it has to "whip around" as the bullet is leaving the muzzle. Kinda like the shorter the tuning fork is the less it whips around at the tip. Am I right? And if I am right does a barrel that has been shortend 2-3 inches display that worsing accuracy at 400-500 yards.