deeper - 9:06 pm on Jun 27, 2013 (gmt 0)
This may be another reason, as cloning sites often seem to be of low quality in general and get penalties more than other sites.
But more than this I fear they produce easily pinguin anchor penalties.
In my case it is a subpage which has backlinks more than 60% from clones. Pages with few backlinks in total but many from clones... if there are many webmasters with no problems by pinguin in this case this would refute my opinion.