Lo and behold, I could! I was a bit surprised because the other day, when I wore a pair of indoor soccer shoes to run the mile down to my favorite path, I couldn't keep it up at all. The Frees offer a lot more sensitivity to the road and have more side-to-side flexibility than a regular shoe.
The main drawback to wearing the Free is that it has a thick heel cushion. If you don't already know how it should feel to run naturally, it's easy to continue pounding your heels to the ground instead of modifying your form. I think that after running a few times barefoot, I'm more able to fully utilize the potential of the Free.
Lisa ran with me and after running for awhile, switching between wearing shoes and going barefoot, she says that she was able to improve her form even in thick running shoes. The main difference is simply that you land on the outside of your midfoot and roll in to the ball of your foot rather than slamming your heel down. Your feet and calves cushion the shock much better than foam rubber ever will.
I probably should have taken another day off, though. This transition really puts a lot of strain on my calves. After a slow, 52-minute run, my calves were completely burnt out again. Even after an ice bath and a calf rub, I still couldn't walk normally. Today, I was still limping around. I felt less sore, but my muscles were so tight that I could hardly walk up stairs!
I can't wait for another fully barefoot run, but I feel like I should wait even longer to make sure that I'm fully recovered before running again. This is agony! I'm so happy about running, and the weather is perfect, but I'm trapped by a couple of sore muscles.