Dude, a purple belt in jujitsu is MORE likely to put the average joe to sleep...Gracie Jujitsu is LEGIT...They just don't give out belts for fun...
Somebody on this forum posted a Youtube video of some White dudes going to Black neighborhoods to fight...The black dude blew his wad throwing punches, even knocked down the White jujitsu guy, but they ended up in tangle on the ground, the average "rah rah I am so tough because I am a hood nikka" went to sleep...
His buddies had to jump the White Guy to save him...That's is what most likely will happen when a mid-level jujitsu guy fights the average guy of any race...
If the jujitsu guy is not afraid to fight/defend himself, the average joe is going to SLEEP...Unless he gets a lucky 1 punch KO...