At first. But as the article points out, later on the east Texas district was no longer the fastest, but it still attracted a large number of plaintiffs, probably because its procedures and its decisions tended to favor plaintiffs.
Any time that one side gets to decide who runs the system and makes (and enforces) the rules, there are natural forces of evolution that will tend to favor that side. One might also say this is the same thing that is wrong with the binding arbitration system, where something like 95% of all decisions between consumers and a business are made in favor of the business (who selects the arbitrator).