I think that it would be nice to have an option (features?), in which you could disable distcc for calls to econf. Because configure scripts compile lots of small files that are not being run by make, therefore compiling one file at a time redering distcc pointless and time consuming (we now have the bottleneck of network speeds with no other gain).
The easiest way to do it is to just have localhost as the first machine in your distcc hosts list. that way all config stuff is sent to the local machine as normal.
distcc doesn't do configure....it only does compiling...Configuring packages on machines that you aren't running it on would be useless...INVALID?
Er, you meant the compiling of the tests for configure, my bad ;)
Comment #1 is probably the solution here. You could try modifying econf, but then you'd miss any ebuild that doesn't use econf, which means you'd still have problems on certain packages.