i don't know, i saw a montage of Starscream clips that totalled a disappointing minute+. I don't even think the 'Screamer was on screen for more than two minutes. The other bots, though brilliantly depicted, probably had scarce on-screen time as wel; perhaps how the film for made for approx. $150M (Bay's estimate)
i wonder if anyone's actually timed screentime for all the 'bots and 'cons?
just like Venom in SM3, he had like what...5-6 minutes of actual screentime?