I generally don't use my fixed gear for my 14 mile commute when it is or is going to be windy, opting for my 27sp Surly instead.

Recently I've been rethinking that philisophy. The few times I've had to face a long headwind on my fixed gear have not seemed much more miserable than the times when I've been in the same situation on the Surly.

So my question is for those like me who go back and forth between fixed and geared: Do you notice a big speed difference between the two in terms of how the bike perform in a headwind. Does having those easier gears really make a difference in the wind?