Long bursts more effective than multiple short ones?

[Woke Up Dead]

I get the impression that in this game a long, on-target burst will do more damage than multiple short ones even if the sum of the short ones lands as many bullets as the long one. For example, I think I'm more likely to de-wing a plane if I hit it with 9 bullets at once on the wing, rather than three bullets at a time in three bursts on the same spot.

Am I right about this, or am I just imagining things? And if I'm right, is this realistic? Seems that two bullets on the spot ten seconds apart should do the same damage as two bullets on the same spot milliseconds apart.