OK, best way to explain this is if we take a look at the
last page of the stats results.
The first set of columns corresponding to the program build version, indicate how many results have been returned.... kinda like 1 Work Unit.
The second distinct column is the number of particles in the simulation (not entirely sure how this is figured).
Third and final distinct column is the transfer rate, which is basically how good the transfer was (ie. efficient). It is tied in to the particles simulated in the fact that the more efficient results you have, the higher the particles simulated.
That is how someone with less work units can be higher up than someone with more.... just through the fact that they have simulated more particles per unit with higher transfer rates.
This is how I see it, although I could be wrong - quantum physics was never really my strong point and I dont really care if it never is.