Nothing you'll be interested in, only very many stories of people taking their phones in once the throttling news dropped (IIRC, with accompanying geekbench scores showing the effect quantifiably), and being told to pound sand. A couple are downthread.

Besides, it's not as if this is a strange policy. Apple never has arbitrarily replaced phone parts by user request, even with cash in hand, unless the techs could point to a specific problem. Try walking into an Apple store today and ask for a new screen without an obvious problem.. you will not get one.