Yeah there's a graph floating around somewhere, showing how rec is by far the best stat for overdrive. Either it's a bug, or it's written in a misleading non-intuitive fashion. In common parlance, it currently "scales with REC, and gets an additional bonus from INT/END"
Of course, you could always be using power armor, which has a cooldown on block, plus lag, for sometimes upwards of 2-3 second response time. :biggrin: