For general reading interest, here's a brief article on mineclearing during ODS:
http://maic.jmu.edu/Journal/5.3/focu...s_houlihan.htm
As far as mineclearing with US forces in WinSPMBT, I think the current game delay in clearing a "hex" is sufficient if you take into account the total time required for the initial clearance attempt (MICLIC or otherwise), proofing the lane a couple of times, and then marking the open lanes, along with the approach and egress routes.