It certainly does matter. The main cause of spokes breaking is uneven tension. A wheel needs to be both true and have even spoke tension. Small variances in tension are OK, but if they're all over the place the wheel will not be as strong and that's when spokes start breaking. That's why they make a special tool to measure it, and that should be included when any bike shop trues a wheel. If they don't have a tensionometer (or don't use it), that's not where you want to have your wheels serviced.