How dumb is the client really?

[Jarulf]

A question, has anyone ever looked at the client to see how "dumb" it really is? Is any calculations or activities done on the client (for example in parallell to the server) at all? It is obvious that the client has some authority over the server on for example the location of the character, but does it extend to other things? Does the client calculate any of the character stats on its own for example? Or does it completely rely on information by the server? An example could be calculating the damage shown on character screen based on say, Attack Power based on strength (or whatever). Does the client perform any of those for showing or is it sent from server?

I am not implying it overrules the server or if there is such issues, but more along the line to see if it would be possible to find formulas and such (which might or might not be correct or in agreement with the server ones). Classic examples would be in Diablo were the game had calculations for, say, spell damage for showing in the screen that had nothing to do with the actual calcs when you actually cast the spells, however, in many cases it gave the same result and at least was better than no info at all.

Any input? Has anyone looked at this or know of people/sites that have?