Today is the big day--I prepared to (from a distance) connect 9000 charged farads (8.1 volts) to 1050 partially discharged farads (3.5 volts).
Nothing spectacular to report--probably got enough charge (in ten seconds) to run for 20 minutes.
Peak current during the transfer was around 45 amps and the hottest physical component (plug connector, #18 wire) reached 122 degrees F. The wiring and the connector represent about .1 ohm, so that resistance limits the transfer.
To charge Little Flash in one second, I would need to transfer about 400 amps. The connector and wire size to accomplish that (for a one pound robot) seem impractical--so I'll be happy with a ten second charge for now.