This leads me to believe the current patch of PSGroove to re-enable backup booting via the Backup Manager software from the PSJailbreak may not be working as intended, though I'm sure this will be resolved in time. I've seen several people at least claim they can book backups with several of the suggested development boards and the current version of the code, but again, no video proof of anything but ripping backups so far that I know of.
It may, it may not. I've seen conflicting reports. It may depend on the configuration you flash, or it might not work at all. So far as I know there is no video evidence of the BlackCat (or anything, for that matter) actually booting backups, only ripping them.