I am making the presumption that he will go with the pace. There must be a huge bonus on the line from Nike and/or London marathon if he ran a WR in his home marathon.
It looks like a terrible idea to me. Farah has not tried to run a really quick time on the track or in half marathons). He has been all about racing over the last couple of years.
Outside the loss of Bekele over the half, Salazar and Farah have gotten it right tactically since the 2011 10k final so second guessing them is dangerous but the likelihood of a blow up in London must be huge now. I did not think he would win anyway (I made his true price 11/1 for an 8.33% chance) but I give him a 2% chance if he goes through 30km at WR pace with the lead group.
What are people predicting
Farah to limp home in 2.07 after a 61.30 half?
Farah to sit back and move through the field for a win in 2.05?
Farah to get it all right on debut and win the race running 2.02.50?
Farah to get bored around mile 18, get naked and repeat his trick of jumping naked into the Thames?