2 way: 
[12 inds] [2956 donors] [minor ancestry = 0.01] [#generations = 27.00]
 E[r^2] = 0.476 
 Fst = 0.073 
 Rst = 0.069
 see here for plots of Mu, coancestry curves, Fst, log-likelihood trace
3 way: 
[12 inds] [2956 donors] [minor ancestry = 0.01] [#generations = 21.49]
 E[r^2] = 0.460 
 Fst = 0.036(1:2) | 0.076(1:3) | -0.458(2:3) 
 Rst = 0.023(1:2) | 0.070(1:3) | 0.029(2:3)
 see here for plots of Mu, coancestry curves, Fst, log-likelihood trace
 Very low Fst between groups (cannot tell apart).