Its server- and time- specific. Sometimes you can get [2/2] [-] [4/4] in DF. Once (i've even screenshotted!) it was [2/2] [2/2] [3/4] for like 10 minutes, before one of the tanks decided to drop from queue. xD But most of the time? [0/2] [2/2] [4/4]. Or [-] [1/1] [2/2] if light party.