No problem. I'm not sure what you mean by "low slung". If you saw someone that rode a bike with a top tube 6cm shorter than what they'd ride on a road bike, they'd look like they were on their little sister's bike.

Part of what you may be noticing is that the bars are more narrow and most photos of track racers show them riding in the drops as opposed to most road racers are photographed being on the hoods. That combined with the more narrow bars on the track bike.

For example, here is Mark Cavendish, his fit on the bike and the bike size are almost identical. Just lower in the drops. Notice the angle of his back: