Now the reason I ask this (please answer truthfully) is that I visited a music shop today. The shop in question sells quite a bit of pro equipment, among that Pro Tools HD systems. And the person I met had never seen a terminated word-clock. They did not have any T-couplings and no terminations in store. Maybe it was only that single person, but I'm in doubt.

Hi folks
I've been trying to sync up a Swissonic AD96 MKII with an RME 9652 and a Lucid DA9624.
Things were generally unstable with wrong sample rate displays on the RME and a flashing lock light on the Lucid until I removed the BNC terminator from the T connector on the RME word clock in.
Anyone know if not terminating the last piece in the chain is OK?