Totally depends on the fish as far as coming out quick or not.... My pair of Potters Leopard Wrasses stayed out for a few hours before going to bed for the night, my Black Leopard Wrasse stayed hidden for 2 weeks, barely came out even when she did come out and ended up jumping (which is common, so make sure you have a lid of some type)...... I am picking up a regular leopard wrasse from a friend that is shutting his tank down either tonight or this weekend but I don't expect it to hide much as it has been in captivity for 2 years now (It hid for a couple days initially if I remember right tho).
They are poor shippers, even healthy ones can die in shipping as they try to burrow into the bag (like they would hide in the sand when scared/ to sleep) and ruin their mouth. My LFS has brought in probably 50+ various leopards..... I think roughly 15 have made it out of the bag, and 5 have made it past that. Sometimes they just never come out of the sand even.
Goodluck they are beautiful fish, but don't be surprised if you get a bag with a floater in it, unfortunately it happens alot.