To what extent is the quality of a sperm sample affected during transit from the donor's home to a cryobank?
Your volume, count, concentration and morphology are not affected by the transit. This is simply a reflection of how much sperm you are producing and their shape.
You can expect a small decline in the motility of the sperm, dependent on the number of hours in transit. The decline ranges from 5-20%, with an average of about 10%.
Is there a loss in sperm motility due to transport of sperm? The kit's preservative is used to protect the sperm on its journey back to the lab. Loss in sperm motility is generally between 10–15%.
However, the websites don't give any source for their statements, and since they are a cryobank that only accept customers' sample by mail, they have a conflict of interest.