Weighted distribution of ellipticities as measured by lensfit. The grey histogram shows the distribution for the KV-450 data, which is reproduced fairly well using our fiducial simulations (green) that use Sérsic profiles. Similar distributions are obtained when we use real galaxy images from COSMOS (blue) or instead represent galaxies by bulge+disc models (purple). The simulation where the input ellipticities were scrambled gives a very different distribution (red) and is inconsistent with the data.