They stated:

The record-breaking beta saw players average about 5 hours of total play time with 2 hours of this spent in the PvP area, the Dark Zone. In the DZ, 50% of all players went rogue at some point during their play time and Ubisoft added the ‘fun fact’ that; “over 63,309,800 contaminated items were successfully extracted out of the Dark Zone.”

Ubisoft subsequently thanked players for their support of the beta by saying;

The success of the beta should largely be attributed to the popularity of the PvP and the new PVP patch, which was well-received by players. This should give Ubisoft confidence going forward to the release date on March 8th.