So, I'm three days post-race, and I feel great.
I've had two days of very low-level soreness. My quads and hamstrings were slightly achy when standing up from a seated position. My knees were a little creaky doing the same. Both walked off within a few minutes. Also, I have slept like a brick for three nights - deep and long. I have eaten well, no restrictions.
Today, and toenails aside*, I can detect no evidence in my body that I ran a marathon three days ago. No muscle soreness, not even any fatigue, my skinny jeans tell me I'm not swollen. I am back in my heels (after a couple of days of trainers).
I want to run again, but the Internet tells me not to 
. Going to start eating properly from now (no more cherry pie; have put on three pounds in the last ten days 
), and hold off on exercise until next week. I have been riding my bike to commute since Monday though (with the idea of lessening weight-bearing on my feet), and I think this may have helped work off any soreness.
*So, toenails. Second toe on each foot - blisters over top of toe are still intact and toenails simply floating on top of the blister. Fourth toe of left foot was similar but the blister has popped and the toenail seems to have stuck back down (is that possible?). No pain in anyway, just strapped over with tape to stop the weird wobbly feeling.
I am posting this not to be smug - I'm still prepared for some kind of tidal wave of pain - but to hopefully encourage you all that the aftermath won't necessarily be terrible! Fingers crossed you all find the same.