[Distutils] easy_install prefers source?

[Nathan R. Yergler]

At the PyCon sprints Jim and I were working with easy_install and
working_env under Windows and noticed some odd behavior.  When within
an activated working environment, attempting to do something like:

c:\...>easy_install lxml==1.1

attempts to retrieve the source distribution rather than the available
Windows binary egg for PyPI.  Is this the expected behavior?  I would
have expected easy_install to prefer binary eggs.

Thanks,

Nathan