I spoke to Wilson about the LA marathon and he said it was real tough. The hills along with the heat were devastating. He hit the half in 66 minutes and was hurting after mile 16 or 17. From mile 20 it was the Wilson gut fest. He said the next couple of days after the marathon were real hard and he had difficulty walking.
Bottom line is that the marathon is no joke and regardless of what you ran a half marathon in, the full on marathon is another story and can humble and the best of runners.
Be wise and smart if you are training for your first marathon. Go out slow! no need to spend the last three miles walking.