Delaware has a specific court for corporate litigation, the Court of Chancery which is presided over by a judge. So questions are generally scheduled more easily, and decided more quickly. That they have a lot of companies incorporated there leads to both a lot of services for companies trying to incorporate there and a lot of case law which can be relied on to understand how bylaws will be interpreted when brought before the court. In places where there isn't a lot of case law you end up cutting a new trail and a lot of uncertainty in what the outcome would be.