Not too long ago I had a 40D and noted that the silent shooting mode was a significant change in dB from the standard mode. The 40D had a lower tone and softer sound to the shutter overall and when in one of the silent modes had a "pup-pup" sound.

Since having the 7D I have noticed no difference in the three available modes.

Do any other members that have the 7D notice any difference in the acoustics of the available modes?