I can't believe how many people are predicting times several minutes better than the winning times most years. At first I assumed they were sarcastic but now I'm not sure. Unless there's a tailwind, do you guys really realize how incredible a 2:06 at Boston would be even for a top African?
You do realize that he ran 2:04:58 in 2011, right?
HardLoper's point was that all of the fastest times in Boston Marathon history - including Hall's 2:04:58 - were run in 2011, the year of the big tailwind. The fastest time ever run in any other year in Boston is 2:05:52.
Kimetto may be capable of breaking 2:05 in Boston in a "normal" year + maybe 1 or 2 of the top Ethiopian guys, but I don't think Hall is.
For Hall, I'd say anything under 2:08 is very good and gives him a legit shot at going top 3 [maybe even winning if Kimetto and the top Ethiopian guys all blow up - stranger things have happened.]