iPad sales have been declining for so long now that it was almost a jolt to finally see some good news for the tablet in Apple’s numbers. In the past quarter, iPad sales were not only up, but by a substantial margin: up 15% year-on-year. The stock market sent Apple shares soaring to new highs based at least partly on the news.

The company doesn’t provide any breakdown of models, but as analysts have noted, there was rather a large clue …

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