Not only is fixed faster downwind, it seems to be particularly fast into the wind. A few cyclists passing too close given how much people were being blown sideways though.
Not my experience to be honest, same as with downhills this is where other cyclists usually 'get away' as I can't easily spin quickly enough to physically get the bike to that speed. I recognise that's just me not being very good at spinning at 115+ though.
Not only is fixed faster downwind, it seems to be particularly fast into the wind. A few cyclists passing too close given how much people were being blown sideways though.