Yes outside of majins.
Testing karma 60/3 map since it has a max of 16 drops: (with aw thief)
1 - 8
2 - 3
3 - 8
4 - 8
5 - 3
another account
1 - 0
2 - 5
3 - 13
4 - 8
Average: around 2 rc per sta.
Testing karma 40/4 map, max 17 possible drops, all with aw thief
1 - 9
2 - 11
3 - 6
avg 2.167/sta
another account
1 - 0
2 - 3
3 - 3
avg 0.5/sta
Results are actually way too skewed to draw a proper conclusion and small sample size, but if i average both accounts out it's 1.33/sta