Why are my reed relays releasing 10x faster than spec?
The specified switching time is a maximum value, not a typical value.

Your relay may indeed perform better than the specification, but don't count on this for your design. Some other relays of the same type may not perform quite as well, especially under extreme conditions (e.g, when unusually hot or cold, when switching larger voltages or currents, when switching rapidly, after ten years of heavy use, etc).