well, than you lose about 5 MHash/s accepted shares per stick. CGminer also has a hardware error rate of about 1% like BEs that that are detected as ICA. BFGminer detecting them as BES drops your HW down to around 0.6%.
Î dont care about the fight between Luke-Jr and the CGminer team, because it is childish. For most things it is just a matter of taste if you use cgminer or bfgminer, as both are very good mining tools. But if you want to use USB BEs then it is a nobrainer that your only choice is bfgminer, because otherwise your mining income would be about 2% lower.