I think you guys are overthinking it.

It's obvious that Yuuki and Kirito were both able to discern things about each other during their fight. Yuuki doesn't know Kirito any more than he knows her, yet he was still able to gain insight into her through that brief interaction. She obviously did the same.

Quote Originally Posted by MFauli View Post
Next week: Kirito will find a cure for AIDS
More likely, he'll invent the technology that simply allows her to upload her consciousness to the internet.