Board Thread:Questions and Answers/@comment-118.211.8.204-20150302141811/@comment-27384850-20170318201108

1. That still doesn't prove that Kirito was better with two swords than with one, using two swords without Skill Connect could very easily have put him at a disadvantage.

2. The interview only says the Dual Blades (note that it's the skill name, not merely the use of two swords) was more fun, not that he was better with two swords and it really doesn't confirm that it's his preference.