Nobody knows how many file sharers are getting warnings from France's new P2P infringement authority, but Billboard.biz says that French labels are sending 25,000 complaints a day to Hadopi, the agency enforcing that country's "three strikes" law.

The figure comes from David El Sayegh, the head of France's music label trade association, who insists that he doesn't know how many warnings have gone out as a consequence of the stream of complaints. "It is too early," Sayegh told Billboard, but also says that he expects to have an assessment of the impact Hadopi is having on digital sales by early next year.

We're presuming that rights holders hope that legal digital sales will go up, and alleged infringements will go down. Maybe so, but a study released just after the law's passage last year suggested an uptick in areas the legislation doesn't cover, like one-click downloading sites such as Rapidshare.

France's tough online infringement law allows Hadopi to, following a complaint, track down the user in question, initiate a warning process, and ultimately boot the consumer off his or her ISP if the subscriber doesn't comply with instructions to behave.

"Insiders," Billboard reports, say HADOPI is moving cautiously in response to the complaints: "There were fears that their hotline would be overloaded by people calling after having received a warning, or by people protesting at the HADOPI system. Billboard.biz understands the hotline remained much quieter than initially feared."