The Bokeh can definately be a little busy at times - the tree to the top right of the runner in the third photo (Hartmann) is a case in point.
I much prefer the blurring of the 135L, I like to have a zoom for runners on a straight road race (to maximize the number of frames per runner)...
|Black on White by RaVN11|
|Hummingbird and Bee by dibilio57|
from A Big Year - birds
|xheneta iseni _for DPReview by Mike Slade|
from - My Fair Lady - (Portraits in Full Colours Only + A Border)