Could be. Never had tofp in a year of running bf/minimal, lots of minimal. this summer i built up to 35-45 mpw, then took a break. whenever i start up again with running lately, even after a month or more break, i go straight for 30 mile weeks, almost no gradual build up.
I've done hundreds of miles in the sandals with no foot pain whatsoever (well, sore muscles in arches once in a while after a 13 mile+ run here and there, but gone after 48hrs). Calves bother me plenty, but rarely my feet, and that's given bunions and many decades of orthotics and support shoes. I really have no business not being injured more.
this week got a bit of tofp following a couple of really intense running weeks, and after a 7 day stint where I logged more than 55 miles and did three runs of over 10 miles in the mix, after a couple weeks at the 40 mpw range. with shin splints still left over from my first half in labor day.
Do you have any idea how little planning I do for my "training"?
For example, you're now in the 8 mile range? Well, I showed myself I could run almost 8 miles one week this summer, and every week after that, I went up by between 2-4 miles for my long runs. No plan, no working up to it, just the logic of "gee I can run 8 miles. I bet that means I can run 11, or 12, let's try that in a few days"
In other words, I'm not what you would call an example of good, sensible training.
So if I get injured, it could be horrible form, or it could be that I'm a total idiot with no sense, or both.