Speed Shooting

[Talon]

It's not really in my area of interest but you could start by looking up information on Lajos Kassai .

A lot of speed shooting is geared more towards eastern horseback archery,especially with a thumb ring.I would advise not looking at the Lars Anderson video's,although he's very fast (he uses oversized nocks) he's full of himself and spouts a lot of absolute crap about rediscovering old archery techniques which he most certainly hasn't.
The english and welsh longbow men could put a lot of arrows into the air in short order,but I'm guessing it's more the Lajos Kassai style of speed shooting you're interested in.