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)...
|Chicago Alley by tko|
from Down the alleyway
|Callan-5680 by vbuhay|
from What Child's Dream May Come
|Widget by Wilfried HKG|
|Oxbow Bend by stickpointed|
from Landscape - Colour #2