No, not even close.
What he did is impressive, but stupid. He is doing a lot of damage to his body. If he were trained properly, he wouldn't be having all the physical problems like the missing toenails and the blisters.
Also, anything much longer than a 6 hour marathon is basically a walk (for a middle aged man in decent health). Maybe it's just a pet peeve of mine because I'm a runner, but it just feels like bad "running journalism".
I'm much more impressed by someone who sticks to a proper training plan and finishes a single marathon in a respectable time for his/her age.