I believe non-robot owls can actually turn their heads 270 degrees* in either direction. But I don't think Prowl-the-owl is that bad a toy, particularly not compared to some of his Transmetal 2 brethren - Jawbreaker, Iguanus and Cybershark are abysmal.
*Edit for clarification: this means real owls can spin their heads 540 degrees from one extreme to the other. Which is awesome.