With the upstream release of Developer Toolset 2.1, the naming 
convention has changed.

We are moving our previously released version of Developer Toolset 2.0 
from '2.0' to '2' in preparation for the 2.1 release.

The 1.0 and 1.1 directories remain unchanged.

Users of the SL provided yum-conf-devtoolset should not notice any impact.

Pat

-- 
Pat Riehecky

Scientific Linux developer
http://www.scientificlinux.org/