Board Thread:General Discussion/@comment-71.82.164.213-20150409225706/@comment-38120486-20190222180245

For the Medicuboid, the Fandom page touches on that and has a citation. Looks like the citation has a link to the novel rather than the twitter post I remember coming across. https://swordartonline.fandom.com/wiki/Medicuboid

There's also the 2005 popularity contest questions, where Kawahara had the characters answering questions which you can read here: https://taptaptaptaptap.net/sao-qna-kirito/

Kirito says there that he thought Yuuki would win even if he used dual wielding, and, I think, sometimes overlooked, states that he suspected Yuuki could dual wield as well and might have responded by equipping a second sword of her own. Ergo it would not necessarily have been an immediate gain.

There's more out there, I know, and I cannot on the fly find the one I really want in the time I have right now. I will look again later. In the quote I recall, I remember seeing Yuuki's three years in VR being cited as part of it, so she has plenty of experience, plus her having, like Asuna and Kirito, a great deal of natural ability. I believe it was a write up of a Q&A session at a conference.

Kawahara has been pretty consistent when asked about Yuuki, whether directly or through questions to characters, that Yuuki would generally win in a head to head fight. The exception being that he did acknowledge that Kirito would likely win if one of his dual wield swords was Excalibur, because of the stats difference.