Comparing TKD to Jujitsu is kind of useless anyways. You can't really say one is better just because a representative of one style happens to best a few representatives of another style. I'm pretty sure a man like Gracie would have been a world class fighter no matter what discipline he'd chosen because of his mental drive. It doesn't make Ju-jitsu inherently a great art...it means that it suited Gracie well and he used it well. I think a lot of Ju-jitsu guys would, in turn, have their hands full with Evander Holyfield whether or not he knew how to throw an armbar out of bottom guard or not. Because Evander knows how to punch and he uses his weapons well.
Chuck Liddell has proven that you can do very well in MMA relying heavily on stand up striking. I know he's not technically TKD, but close enough for the example to hold up. Of course, in my own personal opinion, ULTIMATE FIGHTER sucks as a gimmick.
If you beat 27 TKD guys I would doubt it had very much to do with their TKD and your Ju-Jitsu...you're probably simply a better fighter and more prepared then they were.
Environment plays a huge factor to. All these ULTIMATE FIGHTER guys fantasize at night about tiny little cages with rounded off fences that give and floors that won't take the skin off your back for rolling around on them for 20 minutes.
Might I add that in Ultimate fighter you are not allowed to eye gouge, stomp, hit the opponent in the throat or groin, fish hook the mouth......the list goes on and on. It's about as much like a street fight as my job at the pizza shack is like being CEO of microsoft.
Aim first to understand; then to be understood.