In a rare but not entirely unprecedented response, Apple's gone on the record Tuesday with The New York Times (of all publications) to admit that a fairly limited number of iPhone 5s units may be plagued with lower than expected battery life and slow charging issues due to what the company attributed to an unspecified "manufacturing issue".
This isn't your typical teething problem fixable in software: Apple has said it will provide owners of the affected phones with a replacement unit. Here's Apple's full statement on the matter...