It seems like most of the new off the peg bikes come with gearings in the mid to high 70's (track influenced) while those who used fixed gear bikes as winter trainers usually ran gearings no higher than 70.

For an all around gear I like to be at that 70 gear inch mark as then there is nothing in my day that I can't overcome be it wind, hills, bad terrain, etc.

The winter bike runs a much lower gearing as do the fg tourers.

But the road bike runs 72 and 80 for those days when it's all about going fast.