IMO 2 days is not that long.....assuming of course that the frag was cut from a healthy and thriving coral, the frag has healed and is doing well, the temp remains constant at around 78, the water stays in bag lol, and free of physical damage. I used to think that corals shipped as colonies would do better but it was pointed out to me that this is not always true. A colony will demand more from the water it is in than a frag will.
Lots of my frags have been 24 hours in transit and one was over 48 hours.....all arrived well and have been thriving ever since.