I didn't find it too noticeable before when playing it originally. But now that you point it out.... I can see it a bit.
All that bugged me really were the funky issues with jumping in certain places, and the turning, but I already went over that elsewhere.
Though you mighta fixed that, I haven't tried the newest update. Too much time arguing with the bloody computer in the last day and a half.
As far as "making sense", the only bit that doesn't make sense to me is the bit where the raptor doesn't have, I dunno, lasers or something. I mean, who wouldn't give lasers to their mad-science dinosaur? Though maybe they just figured that the shot-bouncing thing was funnier.