I've read a bunch of sob stories lately from iOS and Android app developers, and they never say they've sent a DMCA takedown notice that's gone unanswered. Under US law, this is the way to respond to copyright violations. Sending a generic complaint means very little.
Just to be clear, the guy on Reddit also said that Google responded to the DMCA notice, which counters the claim the GP was responding to, specifically the the claim that Google ignores copyright complaints.
That said, it's true that they won't respond to anything except a valid DMCA notice. Anyone who sends anything else is provided with instructions on how to file a valid DMCA notice last I knew.
I have no personal experience with this, but Google makes it very clear that a DMCA notice is the appropriate action in this situation:
http://www.google.com/support/bin/request.py?contact_type=lr...
I've read a bunch of sob stories lately from iOS and Android app developers, and they never say they've sent a DMCA takedown notice that's gone unanswered. Under US law, this is the way to respond to copyright violations. Sending a generic complaint means very little.