Geared vs Fixed - average speed

Personally I find it more about relative pace. If I'm riding fixed with a group riding geared we're usually at the same pace but I often have to 'attack' (puff and pant up) a hill faster than the geared riders and they can usually descend faster than me.

This^

My average doesnt deviate very much. But I can ride further on a geared bike. I guess the repeated big efforts take there toll.