Willie Wessels has pulled 799 @ 229 but his clean was and is horrible. He is a pretty freakishly strong person in all athletics...especiall in Strongman Events.
I think that the theory that people with a big clean are generally more powerful and more explosive...could be slightly incorrect in how it is stated. It is quite possibly "people who are explosive and powerful, in general, tend to also have big cleans."
With the OL lifts...so much of it is technique and if you want to take the average Joe OL lifter then I'd say that if he has a good clean he has pretty solid technique.
I, for another example, have a horrible power clean, yet can pull 700+ and I'm a fairly explosive and powerful athlete.
I still don't understand how the OL lifts will make anyone explosive. My workout partner, Cheese, is the least explosive individual I've ever met...I'm thinking that no matter how much he does the OL lifts...he ain't gonna be explosive. Using Accomodating Resistance has helped him quite a bit though...
B True