Re: Aikido vs Brazilian Jujutsu
The problem with the bjj vs multiple opponent argument is that if your going up against more than one opponent its very likely you will end up on the ground no matter what style your doing. Your only chance is to escape to a safe position where you can deal with each attacker one at a time.
I remember reading in Blitz magazine an article by John Wills (Machado Jujitsu) where he demonstrates how BJJ can be used against multiple opponents. He was suggesting if you are taken down you go to the guard and use your opponent as a shield as you choke him out. Once he is out you try to trip or roll into another attacker and then do the same. Interesting strategy...
Another thing, a good takedown on a hard surface can do quite a bit of damage to your opponent.