Agree. The ls from reefers tend to be exposed to long periods of stress free, stable environment. It will be a huge shock for them to switch to your tank.
In lfs, however, they are exposed from shock for longer periods (from collection, transportation and in lfs tanks). Hence, weaker specimens are selected out during this process. You tend to get "hardier" specimens than from reefers, that is of course, unless you have very similar parameters to the reefers you are purchasing from