Dixon's 2:08:59 was in winning NYCM, NOT a fast course. As I recall, he also ran much of it in "No Man's Land", trying to catch Geoff Smith, who he often couldn't see.
Also, his 33 was lees than two seconds off of Bayi's 3:32 WR in the same race.
Imagine a big, badass white dude having a contemporary range of 3:27/2:05,and you get the idea.