The evidence I see is that Apple does not change pricing but rather stakes out a specific price point as resonating with consumers given their positioning. They then doggedly stick to it. Competitors tend to exploit open price points or try to position with specs on the same spots Apple occupies.
Apple doesn’t do anything based on what its competition does, including price. Apple’s products are priced fairly and at what consumers can afford, and are willing to pay. The proof is the 37 million iPhones, 15 million iPads, 15 million iPods, and 5 million Macs the company sold last quarter.