Funny, but there is a thread about Oswaldo Alves on the BJJ forum. Lots about wrist locks.

Jacare does a pretty good job making them work against resisting opponents.

I use them in sparring, most often from the seated guard and standing.

So I wasn't denigrating wristlocks so much as the training methods of Aikido and Daito-ryu Aiki (ju)jutsu.