I wish people would just drop the Boston crap. Boston was always considered a tough course- there are uphills and the downhills often mess people up.
If the IAAF didn't come up with those stupid restrictions no one would even think about it.
Watch the "Dual in the Sun" video- they talk about the WR, didn't Joan Benoit set a WR there? No one questioned it and she went on to run fater.
Boston times are legit.
Now, the odds of ANYONE setting a WR are slim- everything, external and internal, has to be perfect. So, predicting that someone WON'T set a WR is easy and the odds are in your favor.
The only "strange notions" are those that question times at Boston.
There are simply too many quality marathoners to name a "best" marathoner. 20-30 years ago there were fewer and usually one 4-6 at the very top.
The real question is: Will running such a high stress, high quality marathon 4 months prior to the Olympics be too much for the 3 Kenyans who get through this to the games?