The mean viral load reduction in HCV in the most potent arm (1.5 QW) was 3.6 log (see caveat below).
Note that I believe this is probably on the high side of what will be seen if you tried to replicate it - since I compared the day 8 response for 1.5 QW with day 8 1.5 Q2W. At day 8 the two should be comparible but the QW group is doing substantially better than the Q2W group. That said I still think even if you corrected it by 20% (a WAG pulled from how much worse the Q2W day 8 data was than the QW) it is still well above 2.0.