Am I not reading this graph right?
http://www.overclockers.com/articles481/dissvsflow.gif
Granted it is at a rather typical 120mm fan pressure and not something more typical of a serious fan, but for the application of these heat exchangers to water cooling the 0.05in H2O is pretty tpical. Doesn't this figure imply that for some radiators there is a "sweet spot" where dissipation is improved (Dangerden Cube) and for most others that lowering flow rates increases heat dissipation to some extent?