In the blitz style tournaments, wearing them definitely can work.
Wrestling 3 or 4 matches in a few hours demands lots of conditioning.
However, you can't wear out your first round opponent very easily and if your are not in shape your technique alone is not enough to win, when you can have as little as 15 minutes between matches
I really like that type of tournament and would love to see one live. I would be more excitiing for the fans.
Definitely agree with Sgallan about playing the edge in Folkstyle, erally slows down the scoring, drages the match and negate alot of technique.