Oh I forgot we had an 11 and 10.5. I've finished last night and my averages are pretty similar but mostly because I was very intent on rating songs either pretty high or pretty low.
8.44 (one 11, three 10s)
7.8 (one 10.5, four 10s)
7.45 (two 10s)
7.32 (one 10)
7.1 (two 10s)