6D and EFCS? Possible? Preferred settings?

[l_d_allan]

My impression is that my 6d is capable of EFCS (electronic first curtain shutter), but I'm unclear on the preferred settings.

• Is this associated with the "Silent" mode in the Canon "Drive" menu?
• Is there a way to have a delay before the shutter activates, like 2 seconds or 10 seconds? That seems mutually exclusive.
• Is there a way to use a remote to trigger the EFSC ... normally the "Drive" has to be 2 or 10 sec for the Remote to work. Or not?
• My impression is that the 6d isn't prone to "shutter shock" like many mirrorless cameras (esp. Sony A7r?), but there still is some. Or not?
• If EFCS is available, can I expect to be enough better at reduced vibration than Mirror-Up + 2 second delay? Or not worth it?
• IIRC, there is Mode-1 and Mode-2, but I'm unclear on what they are for.