Board Thread:Questions and Answers/@comment-118.211.8.204-20150302141811/@comment-6697950-20150324073625

Kayaba claimed that the place where Kirito and Asuna meet was made specifically so that Kayaba could speak with them after the battle, so there's reason to believe that Kayaba disabled the death rule for the battle, as making such a space in 10 seconds is rather unbelievable. Of course, the 10 seconds are just for the avatar dispersing into polygons. There's no evidence that the NerveGear's kill switch is activated after those 10 seconds.

Either way, this is a topic about Yuuki and Kirito's battle, not about revival in SAO. Please start a new topic if you want to talk about that.