The Shotgun - Short Snap that we saw in one of the earlier Custom Playbook videos, it looks like it's just a Shotgun - Split Slot Offset but it has some plays that I don't think are in the standard Split formations. Namely is one that Arkansas State ran last year with a read on the FB and the HB comes around behind for a swing pass.

Not sure why it's called Short Snap as it appears to be the same distance as normal shotgun unless it's just a terminology that I'm not familiar with.