The Morgan duron that I just recieved (a few weeks ago) has a distinct trench down the center of the bridges.  I am not sure it would be possible to bridge it with a pencil.  I am not sure if this was a fluke or what, but it sure didn't look easy to unlock.
It was for a friend anyway, and I don't overclock friends systems too much anyway(if they couldn't do it themselves).  I have a 10mhz fsb increase and it is still happy and it runs great.  I am really happy with it.