pump mode & compile linux kernel: possible?

As has been noted elsewhere...
http://blog.electric-cloud.com/2009/01/26/building-linux-26-with-electricaccelerator-and-distcc/#comment-122
...pump-mode and a linux-kernel build do not get along - 
distcc quickly degrades to standard mode. Is anybody currently using 
pump mode to compile linux that could share any hints?
The manapage's notes are out-of-date and do not resolve the problem - I can 
provide build logs if needed.

Thanks
joey
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