Yes, but there is lateral play in that 3000. Very slight, but its there.
I would think if you bump the table or have a dull bit and are really pushing that it will give and spring back ever so little, but enough to give you ripple in say a cove bit profile that is a pain to sand out.
I think the real question here is; "Is there any reason not to lock it". No there is not. It can only help and not hurt.
I always pull the springs when I put a router under a table, but that's me.
I guess I gave 4 cents on that one.