Histograms of (left) and r^TE (right) as measured on polarization maps synthesized from the three models with feedback (top) and without feedback (bottom). Power spectra corresponding to all values of f_sky are put together, making an ensemble of 432 measurements per galaxy setup. The vertical gray dot-dashed (red dashed) lines mark the values of (2) on the left and of r^TE = 0 (0.4) on the right, for reference.