The article claims the average selling price of non-iPad tablets (which must be 99% Android) increased by 17%, while the iPad mini pulled the iPad ASP down by the same amount, so your theory is at odds with the facts.
You have to know the real numbers to make that determination. Increased 17% from 100 is 117. iPad decreasing from 550 to 450 (pulled out of my ...) would mean the parent is still right.
the iPad mini it may be mini, but is still expensive, and from my own empirical experience, 9 out of 10 tablets I see in the user hands are cheap $59 devices.