Apparently the Chinese site was wrong about the director – from Anime Corporation News:
The Famitsu website is featuring screen shots and information on the second season for the Genshiken anime. Notable staff changes include a new director: Yoshimoto Kinji (Plastic Little) and character designs by Yanagida Yoshiaki (Kujibiki Unbalance TV). A new opening will be performed by Misato Aki (My-HiME) and a new ending by Yuumao. Season 2 of Genshiken is scheduled to premiere this October.