chicagohh - 8:11 pm on Aug 14, 2012 (gmt 0)
Having been involved in several DMCA wars my first thoughts are, "Game on".
It appears to be legally safer to file a DMCA Complaint than a Counter Notice. A DMCA complaint is done in "good faith" - a measurement that has a lot of wiggle room. Filing a Counter Notice is done, "under penalty of perjury".
Last year I had a dental marketing company file three DMCA complaints in a row against one of my sites (original hand written content by me). It was a major pain in the a$$. I only found out because they also sent one to my host who was kind enough to contact me before removing the targeted pages. So, three DMCA complaints and three Counter Notices. I have written about this situation several times going back a few years. There is only one way to stop a situation like that...