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Probably true, but it would be trivial to run the physics loop a few times before rendering the first frame to remove the jitter. A neophyte developer would know how to do this and the folks at Rovio are pretty experienced. My vote is with conscious decision.

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The idea must have been to avoid that extra second of wait. As long as I see the screen a second earlier I don't care if the pigs jittered a bit.

But they could probably run the physics loops for a few seconds and store the map layout after it has stabilized, not?

Not only that, but there is no reason that the physics loop would have to be run in real-time. They could just as easily run the physics loop for a few frames as fast as the hardware would let them with fixed deltas of average frame length (probably 1/30th of a sec). Chances are they could run half a second of simulation in just a few milliseconds without the need to render.

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