It doesn't need to be said, it needs to be thought out. Think logically, and take, for example, the microwave. Microwaves, 10 years ago, were much bigger, clunkier, and less efficient as they are today. Technology progresses with the needs of the society. Now, the Lantean/Wraith war existed for at least 100 years. Even if the Asurans were "sedated", in a sense, 10 years before the Ancients fled, the technology of the Aurora would have still advanced. Shield strength, sensors, they would have still been advancing up to the time they evacuated.