> I understand that you're looking to verify successful migration of your information after installing OS X 10.11
nope, I didn't install 10.11 - I merely migrated data from one machine to another (to a 10.9.5 Mac Pro) from a clone disk (of a 10.8.5 system).
> Migration Assistant does, indeed, log information, and does so to system.log (easily accessible via the Console utility in /Applications/Utilities) as opposed to its own log file. In the Console utility you can use the search box at the top right to search for "Migration Assistant" (without the quotes) to view only messages from Migration Assistant. If you don't see anything definitive via that means, search for "systemmigrationd" (again, without quotes) to look for any failures on the part of the process itself.
yep, tried that, no sign of "Migration Assistant" or "systemmigrationd" at all - not even that the process began!