No, in "Astral Dynamics" Bruce writes that the silver cord does indeed exist, but, as any other body part of the astral, is only seen/felt if deliberately looked for.
William Buhlman writes that only the first energy body (which would be Bruce's "real time body" or the esoterics' "etheric body") has a silver cord that connects it to the physical. So if you have projected a "higher" body, you won't experience it. The idea about being conditioned to the cord also deserves some consideration. However, many early projectors (e.g. Muldoon) experienced the cord although they didn't know anything about OBE at this time.
I've experienced only real time projections close to the physical so far and almost everytime felt (and sometimes seen) the cord.
William Buhlman writes that only the first energy body (which would be Bruce's "real time body" or the esoterics' "etheric body") has a silver cord that connects it to the physical. So if you have projected a "higher" body, you won't experience it. The idea about being conditioned to the cord also deserves some consideration. However, many early projectors (e.g. Muldoon) experienced the cord although they didn't know anything about OBE at this time.
I've experienced only real time projections close to the physical so far and almost everytime felt (and sometimes seen) the cord.