I'd always gone on the fact it's out of 10, so the average is 5, therefore an average performance gi8ves you a 5/10. I'm not sure there a right answer, the baseline score is whatever the person voting thinks it is 🙂
Overall I think those scores represent a team that has been at best bang average all season, I'm surprised by Gallagher's score too but that's why we created the poll, so that everyone gets to have their say.