"Computer games don't affect kids; I mean if Pac-Man affected us as kids, we'd all be running around in darkened rooms, munching magic pills and listening to repetitive electronic music." - Marcus Brigstocke
Most of the presets I've used have no reverb at all as standard, though I often add some. A few of them do have a bit of vibrato and/or detune but that's all I've noticed. Can you give some specific examples of the presets you mean ?