It wasn't a century or any organized ride. I went out for 50 or so and got carried away as the weather was perfect today.
I did notice one difference between a longish ride on the FG vs a geared bike. It seems easier to rest/re adjust my rear while coasting down hill or up to a stop. I can easily stand and pedal on the FG but it's not the same. Part of the issue may have been I've not gone longer than 50 miles since July so I'm not toughened back up yet.
I rode a 30 mile group ride on Saturday and the longish ride on Sunday. I choose the F.G. for both, I'm beginning to wonder why I own a geared bike. I think the answer is for all out speed over distance I'm a bit quicker on the geared bike but, I'm choosing the F.G. more and more.
Anyway if you've got a F.G. and haven't taken a longish ride on it, go for it!