The shunpo was expected.  It was something she would have been taught.  However, Zhou responded with a somewhat unorthodox method in response.  His free hand would grip the loose sleeve of her robe and he'd bring his body in close with hers.  The strike would be sent awry, and she'd experience, painfully, exactly how strong the lightning armor he clad himself in could be.  He didn't even need to strike with his zanpaktou.  This was one of his unorthodox methods that made him a favorite within the Eleventh Squad.